Commissioning Smartec S CLD134
44 Endress+Hauser
6.4.6 Relay configuration
For Smartec S CLD134 equipped with remote parameter set switching (measuring range switching),
there are three options for configuring the relay (selection in field R1):
• Alarm
The relay closes the contact 41/42 (voltage-free, safe state) if an alarm condition according to
chapter 9.2 occurs and if the setting in the “Alarm contact” column is “yes”. You can change
these settings as required (field F5 ff).
• Limit
The relay only closes the contact 42/43 if one of the defined limits is violated (value above or
below limit, see Fig. 38) but not when an alarm condition is detected.
• Alarm + Limit
The relay closes the contact 41/42 if an alarm condition occurs. Limit violations only cause the
relay to switch if error E067 is set to “yes” during relay assignment (field F6).
Please refer to Fig. 38 for a graphic representation of the contact states of the alarm contact.
• When the measured value increases (max function), the relay goes into alarm state (limit
exceeded) at time t2 when the switch-on point has been exceeded (t1) and the pickup delay
(t2 – t1) has expired.
• When the measured value decreases, the relay returns to normal operating state when the
measured value drops below the switch-off point and after the dropout delay (t4 - t3).
• When the pickup and dropout delays are set to 0 s, the switch-on and switch-off points are
identical to the contact switching points.
Settings for a minimum function can be made in the same way as for a maximum function.
Coding Field Selection or range
(factory settings bold)
Display Info
P
Function group
CHECK
Settings for sensor and process monitoring.
P1
Set PCS alarm
(live check)
off
1 h
2 h
4 h
This function is used to monitor the measuring
signal.
An alarm is triggered if it does not change for
the period selected here.
Monitoring limit:
0.3 % of mean value over selected period of
time.
(Error no.: E152)
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