YSI IQ SensorNet DIQ/CR3 - Manual (Page 31)

MIQ/CR3; DIQ/CR3 Settings
4 - 17 ba76032e01 01/2012
4.5.2 System monitoring
Function The System monitoring enables to monitor system errors.
In order to set up the System monitoring function for a relay output, the
relay output must not be linked with a sensor (see section 4.3).
It can be used to monitor the following system errors.
Settings
Collective error
message
In the case of a Collective error message, the relay opens if one of the
following malfunctions occurs:
 One of the sensors properly registered at the controller does not
supply a valid main measured value
 One of the sensors properly registered at the controller does not
supply a valid secondary measured value
 The monitoring combi output module has not received any new data
from the controller for two minutes.
In any case, the relay remains open for 10 seconds and only closes
when the malfunction is no longer present.
In the following cases, the relay does not open despite an invalid
measured value:
Settings Selection Explanations
Power failure On
Off The Power failure On function
monitors the supply voltage in
the IQ S
ENSOR N ET on the
combi output module. If the
voltage falls below the critical
value, the relay switches.
Communication On
Off The Communication On function
monitors the functioning of the
controller and the
communication to the combi
output module.
Collective error
message On
Off The Collective error message
On function simultaneously
monitors the proper functioning
of all sensors and the
functioning of the monitoring
combi output module. (for
details see below this table)
Action Open For all functions of the System
monitoring, the relay action is
set to Open.