Multifunction Digital Inputs; Multi-Function Digital Output; Extra Led Indicators - Carel FCM series Manual

6.6

Multifunction digital inputs

The terminal block comes complete with two digital inputs which can be associated with two commands, whose function can be selected
by using parameters C29 and C30.
•
automatically-reset alarm: when the contact opens, the analogue output is immediately forced to 0 V and the corresponding alarm is
generated. The alarm condition will persist until the contact closes.
•
manually-reset alarm: when the contact opens, the analogue output will be immediately forced to 0 V and the corresponding alarm
will be generated. The alarm condition must be reset manually, that is acting on the keypad, after the contact has closed again.
•
delayed alarm and manual reset: the same as the manually-reset alarm. The alarm will be generated as soon as the previously set
time-interval has passed (parameter P28).
•
enabling/disabling: in the event of open contact, the analogue output is immediately forced to 0 V.
•
max. value of the 0÷10 V output: in the event of closed contact, the analogue output is immediately forced to 10 V, independently of
the max. value given to the parameter.
You should notice the following:
1. If you select an operating mode which involves a command coming from terminal block (C00 grater or equal to 4), the command
automatically matches the ID1 input.
2. If both digital inputs are available and they are given the same function (alarm, enabling or output to 100%), ID1 has priority.
6.7

Multi-function digital output

The terminal block comes complete with a relay digital output which can be associated with one of the functions listed below. You can
select the normally energized relay or the normally disenergized relay option (parameter C31). When you select the Cooling/Heating
operation mode with defrost management (parameter C00=8), the relay is used to manage the defrost cycle, independently of the
previously set programmed functions.
•
Alarm signal: generates in the event of any off-normal condition.
•
Active 0-10V output signal: generates when the voltage supplied to the 0÷10 V output is different than 0 V.
•
Signal of max. value of the output: generates when the voltage supplied to the 0÷10 V output has reached its max. programmed
value. It disappears when the hysteresis is 0.5 V. (The speed-up function does not affect this signal).
•
On/Off regulation: starts when the voltage to the 0÷10 V output reaches its max. programmed value. It deactivates when the voltage to the
0÷10 V output reaches its min. programmed value. (The speed-up function does not affect this signal).
6.8

Extra LED indicators

The display shows:
•
LED OUT ---> indicates the status of the 0÷10 V output of the controller
•
LED AUX ---> its meaning depends on the selected operating mode
Type
OUT
AUX C00=0,1,2,3
C00=4,5,6,7
C00=8
FCM electronic regulator
Status Description
off 0 V output
on output energized
blinking output at max. programmed voltage
off relay digital output disenergized
on relay digital output energized
off input ID1 open (matched function not active)
on input ID1 closed (matched function active)
off input ID1 open (cooling mode)
on input ID1 closed (heating mode)
blinking input ID1 closed (heating mode) and defrost commad active
Fig. 6
Tab. 1
10
Cod. +302235300 - Rel. 2.0 del 30/11/98