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User Manual
Piccolo Range
5.2.6 Output 2
Output 2 may be fitted with a relay (form A), or a triac or an analogue output depending on the order code. The
function of the output may be selected from a list of options including heat or cool outputs for the control loop, or
alarms or events which may be used for external indication. mA outputs may be used to re-transmit setpoint,
measured temperature or output demand.
P12
Select P12 to configure Output 2 (OP2).
In P116, output 2 may be Relay, Analogue or Triac depending on the order code.
In P108 and P104, output 2 may be Relay or Triac depending on the order code.
Each output can be used for control, retransmission, alarms or events as listed below:-
nonE
Heat
Output disabled
Heat output
(default)
Output 2 controls the heating power demand. The sense
is set to normal – the state of the output is shown in the
table. This is the usual setting for control outputs.
The code can be checked
against the label on the side of
the controller and the ‘Order
Code’ in section 1.5.
Relay
Logic
OP2 State when heating
Analogue
Energised
ON
On
CooL
Cool output
Output 2 controls the cooling demand. The sense is set
to normal – the state of the output is shown in the table.
This is the usual setting for control outputs.
OP2 State when cooling
Relay Energised
Logic ON
Analogue On
AL1 Alarm 1
Alarm active
AL2 Alarm 2 Output 2 will operate as shown in the table if the alarm Relay Energised
AL3 Alarm 3
selected is active.
Logic ON
Analogue On
AL1.i Alarm 1 inverted.
Output 2 will operate as shown in the table if the selected
Alarm active
AL2.i Alarm 2 inverted alarm is active. This is the normal setting for alarms since Relay De-energised
AL3.i Alarm 3 inverted
if power to the controller fails an alarm state will be Logic OFF
indicated by a powered external device.
Analogue Off (0mA)
SP.rt
SP re-transmission
If OP2 is mA it can be used to transmit an analogue value
proportional to the setpoint to an external device.
The value is clipped to Low
(SP.Lo) and High (SP.Hi)
Setpoint limits set in Level 2.
oP.rt
OP retransmission
If OP2 is mA it can be used to transmit an analogue value
proportional to the output to an external device.
The value of the analogue
signal is clipped to the Low
(oP.Lo) and High (oP.Hi)
output limits set in Level 2.
Pv.rt
PV re-transmission
If OP2 is mA it can be used to transmit an analogue value
proportional to the process variable to an external
device.
The value of the analogue
signal is clipped to the Low and
High scale range set in P codes
P3 and P4.
t.End
t.rUn
Timer end status
Timer run status
OP2 can be used to operate an external device to
indicate when the timer has timed out. A relay is
energised and a logic output is ON when the timer has
timed out.
OP2 can be used to operate an external device to
indicate when the timer is running. A relay is energised
and a logic output is ON when the timer is running.
Timer Operation is described in
section 4.12.
48 Part No HA031260 Issue 1 May -12