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I/O Module
4.2.4 Digital input for disabling the general alarms
When the input is closed, the alarms ATyH, ATyL, AFx, TDx are disabled.
If the parameter Dx=0, the alarms are disabled for an undetermined time, while the input is closed.
If Dx<>0, the alarms are disabled for the time Dx from when the contact is closed. The opening of the contact does not stop the
disabling function, while the closing of the contact again resets the disable time.
The status of the digital input for disabling the alarms is monitored using the variable DIx.
Configuring a digital input to disable the general alarms:
1. Configure the presence of the digital inputs: digital inputs 1 and 2, always present; 5 and 6 present if MOD=1/3/5/7.
2. Set the parameter Ax=4.
3. Set the disable alarm time Dx.
4. No probe needs to be associated to the digital input.
5. The time DKx is not enabled.
4.2.5 Digital input for activating the cleaning cycle
When the digital input is closed, the alarms ATyH, ATyL, AFx, and TDx are disabled.
When the time Dx has elapsed, the controller sends the warning signal CT, and alarms remain disabled while the digital input not is
closed. If the parameter Dx=0, the cleaning cycle timeout signal is sent immediately.
The physical status of the input is monitored using the variable DI(x).
Configuring a digital input to activate the cleaning cycle:
1.
2.
3.
4.
5.
Configure the presence of the digital inputs: digital inputs 1 and 2, always present; 5 and 6 present if MOD=1/3/5/7.
Set the parameter Ax=5.
Set the cleaning cycle time Dx.
When the cleaning cycle is active, the status of the digital input associated with this function can be displayed on the
supervisory system. The cleaning cycle status parameter is CT: 0= cleaning cycle active; 1= cleaning cycle timeout.
This differs from the defrost function in the following ways:
- the timeout is accompanied by a signal only to the supervisory system;
- the alarms are disabled during the cycle without having to associate any probe, and consequently on all those previously
configured on the instrument;
- the alarms are disabled until the contact is switched, and not only after D(x).
Carel code +030220241 Rel 1.0 dated 19 September 03
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