SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd. SJ700-2 Instruction Manual NT204DX - Hitachi America, Ltd.
Chapter 4 Explanation of Functions The speed control normally incorporates the proportional integrated compensation (PI control), and the motor speed is controlled so that Torque the difference between the frequency specified by the frequency command and the actual motor speed is zero. However, a specific operation mode (called drooping operation), in which one load is driven by multiple motors, sometimes requires the proportional control (P control). To enable the proportional (P) control mode, 100% assign function "43" (P/PI switching function) to one of the terminal [1] to [8] functions (C001 to C008), and turn on the intelligent input terminal. For the proportional control, set the value of the P control proportional gain (H052) as the KPP value. The following formula generally represents the relation between the KPP value and momentary speed variation: 0 10 (Momentary speed variation) = (%) (Set value of KPP) The following formula generally represents the relation between the momentary speed variation and speed error: Speed error at rated torque (A) (Momentary speed variation) = × 100% Synchronous rotation speed at base frequency 4.2.56 Analog command holding function (AHD) - The analog command holding function allows you to make the inverter hold the analog command input via the external analog input terminal when the AHD terminal is on. - While the AHD terminal is on, the up/down function can be used based on the analog signal held by this function as reference data. - When "01" is specified for Up/Down memory mode selection (C101), the result of up/down processing can be stored in memory. - If the inverter power is turned on or the RS terminal turned off with the AHD terminal left turned on, the data held immediately before power-on or turning off the RS terminal will be used. Item Function code Data Description Terminal [1] to [8] functions C001 to C008 65 AHD: Analog command holding 4.2.57 Intelligent pulse counter (PCNT and PCC) - The intelligent pulse counter function allows you to input a pulse train via an intelligent input terminal. P control mode - The cumulative count of input pulses can be monitored by the pulse counter monitor (d028) function. - The value of cumulative counter cannot be stored. The counter value is cleared to zero when the inverter power is turned on or the inverter reset. - Turning on the PCC (pulse counter clear)terminal clears the cumulative counter. - The frequency resolution of the input pulse can be calculated by the formula shown below (for pulse signal input with a duty ratio of 50%). Frequencies not less than the relevant resolution cannot be input. It is recommended to use this function up to 100Hz. For the input terminal response, see Section 4.2.79. Frequency resolution (Hz) = 250/(input terminal response time setting [C160 to C168] + 1) Example: When the input terminal response time is 1, the frequency resolution is 125 Hz. Input terminal response Input pulse AHD terminal Input analog command Frequency command ON PI control mode (A) Rotation speed Related code C001 to C008: Terminal [1] to [8] functions C101 : UP/DWN holding function Remark) Set frequency remains when inverter is switched with SET/SET3 terminal with AHD on. Turn AHD terminal off to re-hold the set frequency. Remark ) Frequent use of this function may damage the memory element. Related code C001 to C008: Terminal [1] to terminal [8] functions d028: Pulse counter monitor ON PCNT OFF Value of counter 1 2 3 4 4 - 60
Chapter 4 Explanation of Functions 4.2.58 Intelligent output terminal setting You can assign the functions described below to the intelligent output terminals [11] to [15] (C021 to C025) and the alarm relay terminal (C026). The intelligent output terminals [11] to [15] are used for open-collector output, and the alarm relay terminal is used for relay output. You can select the a-contact or b-contact output for individual output terminals by using functions "C031" to "C035" and "C036". When "01" (3 bits) or "02" (4 bits) is specified for the alarm code output "C062" (see Section 4.2.65), the alarm code output is assigned to output terminals 11 to 13 or output terminals 11 to 14 (AC0 to AC3), respectively. Subsequently, the settings of "C021" to "C024" are invalidated. Data Description Reference item Page 00 RUN: Running signal Running signal (RUN) 4-62 01 FA1: Constant-speed reached 02 FA2: Set frequency overreached Frequency-arrival signals 4-62 03 OL: Overload notice advance signal (1) Overload restriction/overload notice advance signal 4-40 04 OD: Output deviation for PID control PID function 4-26 05 AL: Alarm signal Protective functions - 06 FA3: Set frequency reached Frequency-arrival signals 4-62 07 OTQ: Over-torque Over-torque signal 4-65 08 IP: Instantaneous power failure 09 UV: Undervoltage Instantaneous power failure/undervoltage 4-35 10 TRQ: Torque limited Torque limitation function 4-92 11 RNT: Operation time over Operation time over signal 4-64 12 ONT: Plug-in time over Plug-in time over signal 4-64 13 THM: Thermal alarm signal Electronic thermal protection 4-37 19 BRK: Brake release 20 BER: Brake error Brake control function 4-81 21 ZS: 0 Hz detection signal 0 Hz detection signal 4-64 22 DSE: Speed deviation maximum V2 control mode selection function 4-96 23 POK: Positioning completed Orientation function 4-104 24 FA4: Set frequency overreached 2 25 FA5: Set frequency reached 2 Frequency-arrival signals 4-62 26 OL2: Overload notice advance signal (2) Overload restriction/overload notice advance signal 4-40 27 Odc: Analog O disconnection detection 28 OIDc: Analog OI disconnection detection Window comparators function 4-71 29 O2Dc: Analog O2 disconnection detection 31 FBV: PID feedback comparison PID function 4-26 32 NDc: Communication line disconnection RS485 4-67 33 LOG1: Logical operation result 1 34 LOG2: Logical operation result 2 35 LOG3: Logical operation result 3 36 LOG4: Logical operation result 4 Logical operation function 4-66 37 LOG5: Logical operation result 5 38 LOG6: Logical operation result 6 39 WAC: Capacitor life warning Capacitor life warning 4-67 40 WAF: Cooling-fan speed drop Cooling-fan speed drop 4-68 41 FR: Starting contact signal Starting contact signal 4-68 42 OHF: Heat sink overheat warning Heat sink overheat warning 4-68 43 LOC: Low-current indication signal Low-current indication signal 4-69 44 M01: General output 1 45 M02: General output 2 46 M03: General output 6 47 M04: General output 4 Easy sequence function - 48 M05: General output 5 49 M06: General output 6 50 IRDY: Inverter ready Inverter ready signal 4-69 51 FWR: Forward rotation Forward rotation signal 4-69 52 RVR: Reverse rotation Reverse rotation signal 4-70 4 - 61 Related code C021 to C025: Terminal [11] to [15] functions C026: Alarm relay terminal function
- Page 73 and 74: Chapter 4 Explanation of Functions
- Page 75 and 76: Chapter 4 Explanation of Functions
- Page 77 and 78: Chapter 4 Explanation of Functions
- Page 79 and 80: Chapter 4 Explanation of Functions
- Page 81 and 82: Chapter 4 Explanation of Functions
- Page 83 and 84: Chapter 4 Explanation of Functions
- Page 85 and 86: Chapter 4 Explanation of Functions
- Page 87 and 88: Chapter 4 Explanation of Functions
- Page 89 and 90: Chapter 4 Explanation of Functions
- Page 91 and 92: Chapter 4 Explanation of Functions
- Page 93 and 94: Chapter 4 Explanation of Functions
- Page 95 and 96: Chapter 4 Explanation of Functions
- Page 97 and 98: Chapter 4 Explanation of Functions
- Page 99 and 100: Chapter 4 Explanation of Functions
- Page 101 and 102: Chapter 4 Explanation of Functions
- Page 103 and 104: Chapter 4 Explanation of Functions
- Page 105 and 106: Chapter 4 Explanation of Functions
- Page 107 and 108: Chapter 4 Explanation of Functions
- Page 109 and 110: Chapter 4 Explanation of Functions
- Page 111 and 112: Chapter 4 Explanation of Functions
- Page 113 and 114: Chapter 4 Explanation of Functions
- Page 115 and 116: Chapter 4 Explanation of Functions
- Page 117 and 118: Chapter 4 Explanation of Functions
- Page 119 and 120: Chapter 4 Explanation of Functions
- Page 121 and 122: Chapter 4 Explanation of Functions
- Page 123: Chapter 4 Explanation of Functions
- Page 127 and 128: Chapter 4 Explanation of Functions
- Page 129 and 130: Chapter 4 Explanation of Functions
- Page 131 and 132: Chapter 4 Explanation of Functions
- Page 133 and 134: Chapter 4 Explanation of Functions
- Page 135 and 136: Chapter 4 Explanation of Functions
- Page 137 and 138: Chapter 4 Explanation of Functions
- Page 139 and 140: Chapter 4 Explanation of Functions
- Page 141 and 142: Chapter 4 Explanation of Functions
- Page 143 and 144: Chapter 4 Explanation of Functions
- Page 145 and 146: Chapter 4 Explanation of Functions
- Page 147 and 148: Chapter 4 Explanation of Functions
- Page 149 and 150: Voltage across main circuit termina
- Page 151 and 152: Chapter 4 Explanation of Functions
- Page 153 and 154: Chapter 4 Explanation of Functions
- Page 155 and 156: Chapter 4 Explanation of Functions
- Page 157 and 158: Chapter 4 Explanation of Functions
- Page 159 and 160: Chapter 4 Explanation of Functions
- Page 161 and 162: Chapter 4 Explanation of Functions
- Page 163 and 164: Chapter 4 Explanation of Functions
- Page 165 and 166: Chapter 4 Explanation of Functions
- Page 167 and 168: Chapter 4 Explanation of Functions
- Page 169 and 170: Chapter 4 Explanation of Functions
- Page 171 and 172: Chapter 4 Explanation of Functions
- Page 173 and 174: Chapter 4 Explanation of Functions
Chapter 4 Explanation of Functions<br />
The speed control normally incorporates the proportional integrated<br />
compensation (PI control), and the motor speed is controlled so that Torque<br />
the difference between the frequency specified by the frequency<br />
command and the actual motor speed is zero. However, a specific<br />
operation mode (called drooping operation), in which one load is<br />
driven by multiple motors, sometimes requires the proportional<br />
control (P control). To enable the proportional (P) control mode, 100%<br />
assign function "43" (P/PI switching function) to one of the terminal<br />
[1] to [8] functions (C001 to C008), and turn on the intelligent input<br />
terminal. For the proportional control, set the value of the P control<br />
proportional gain (H052) as the KPP value.<br />
The following formula generally represents the relation between the<br />
KPP value and momentary speed variation:<br />
0<br />
10<br />
(Momentary speed variation) = (%)<br />
(Set value of KPP)<br />
The following formula generally represents the relation between the momentary speed variation and speed error:<br />
Speed error at rated torque (A)<br />
(Momentary speed variation) = × 100%<br />
Synchronous rotation speed at base frequency<br />
4.2.56 Analog command holding function (AHD)<br />
- The analog command holding function allows you to make the inverter hold<br />
the analog command input via the external analog input terminal when the<br />
AHD terminal is on.<br />
- While the AHD terminal is on, the up/down function can be used based on the analog signal held by this function as<br />
reference data.<br />
- When "01" is specified for Up/Down memory mode selection (C101), the result of up/down processing can be stored<br />
in memory.<br />
- If the inverter power is turned on or the RS terminal turned off with the AHD terminal left turned on, the data held<br />
immediately before power-on or turning off the RS terminal will be used.<br />
Item Function code Data Description<br />
Terminal [1] to [8] functions C001 to C008 65 AHD: Analog command holding<br />
4.2.57 Intelligent pulse counter (PCNT and PCC)<br />
- The intelligent pulse counter function allows you to input a pulse<br />
train via an intelligent input terminal.<br />
P control mode<br />
- The cumulative count of input pulses can be monitored by the pulse counter monitor (d028) function.<br />
- The value of cumulative counter cannot be stored. The counter value is cleared to zero when the inverter power is<br />
turned on or the inverter reset.<br />
- Turning on the PCC (pulse counter clear)terminal clears the cumulative counter.<br />
- The frequency resolution of the input pulse can be calculated by the formula shown below (for pulse signal input with<br />
a duty ratio of 50%). Frequencies not less than the relevant resolution cannot be input. It is recommended to use this<br />
function up to 100Hz. For the input terminal response, see Section 4.2.79.<br />
Frequency resolution (Hz) = 250/(input terminal response time setting [C160 to C168] + 1)<br />
Example: When the input terminal response time is 1, the frequency resolution is 125 Hz.<br />
Input terminal response<br />
Input pulse<br />
AHD terminal<br />
Input analog command<br />
Frequency command<br />
ON<br />
PI control mode<br />
(A)<br />
Rotation speed<br />
Related code<br />
C001 to C008: Terminal [1] to [8] functions<br />
C101 : UP/DWN holding function<br />
Remark)<br />
Set frequency remains when inverter<br />
is switched with SET/SET3 terminal<br />
with AHD on. Turn AHD terminal off<br />
to re-hold the set frequency.<br />
Remark )<br />
Frequent use of this function may<br />
damage the memory element.<br />
Related code<br />
C001 to C008: Terminal [1] to terminal [8] functions<br />
d028: Pulse counter monitor<br />
ON<br />
PCNT OFF<br />
Value of counter<br />
1 2 3 4<br />
4 - 60