DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

3. Instruction Set
API Mnemonic Operands Function
144 GPWM General PWM output
Controllers
ES2/EX2 SS2 SA2 SX2
SE
Type
Bit Devices Word devices Program Steps
OP X Y M S K H KnX KnY KnM KnS T C D E F
S 1 *
S 2 *
D * * *
GPWM: 7 steps
PULSE 16-bit 32-bit
ES2/EX2 SS2 SA2
SA2
SA2
SX2 ES2/EX2 SS2 SX2 ES2/EX2 SS2
SE SE SE SX2
Operands:
S 1 : Width of output pulse S 2 : Pulse output cycle (occupies 3 devices) D: Pulse output device
Explanations:
1. When GPWM instruction executes, pulse output will be executes on device specified by D
according to pulse output width S 1 and pulse output cycle S 2 .
2. S 1 : pulse output width. Range: t = 0~32,767ms.
3. S 2 : pulse output cycle. Range: T = 1~32,767ms, S 1 ≦ S 2 .
4. S 2 +1 and S 2 +2 are system-defined parameters, please don’t use them.
5. D: pulse output device: Y, M and S.
6. When S 1 ≦ 0, no pulse output will be performed. When S 1 ≧ S 2 , the pulse output device
remains ON.
7. S 1 and S 2 can be modified when GPWM instruction is being executed
Program Example:
Assume D0 = K1000, D2 = K2000. When X0 = ON, Y20 will output pulses as the following diagram.
When X0 = OFF, Y20 output will be OFF.
t T
X0
GPWM D0 D2 Y20
t=1000ms
Output Y20
T=2000ms
Points to note:
1. The instruction operates by the scan cycle; therefore the maximum error will be one PLC
scan cycle. S 1 , S 2 and (S 2 - S 1 ) should be bigger than PLC scan cycle, otherwise malfunction
will occur during GPWM outputs.
2. Please note that placing this instruction in a subroutine will cause inaccurate GPWM outputs
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