Monitoring functions
Configuring monitoring functions
Heatsink temperature monitoring (OH, OH4)
204
EDBCSXS064 EN 4.0
9.3.6
Heatsink temperature monitoring (OH, OH4)
The heatsink temperature of the controller can be monitored with two temperature
thresholds:
ƒ
Adjustable temperature threshold (OH4)
– Threshold can be set under C0122
– The reaction to exceeding the threshold can be set under C0582
ƒ
Fixed temperature threshold (OH)
– Threshold = 90 °C
– Reaction to exceeding the threshold = TRIP
Fault message
Monitoring function
System variable
Possible response
TRIP
Messag
e
Warnin
g
Off
050
OH
Heatsink temperature
(fixed, 90 °C)
MCTRL_bKuehlGreaterSetValue
_b
·
054
OH4
Heatsink temperature
(adjustable, C0122)
MCTRL_bKuehlGreaterC0122_b
ü
·
ü
·
Default setting
ü
Setting possible
The hysteresis is 5 K, i.e. the switching value for the fixed threshold is 85 °C.
Monitoring with the adjustable threshold (OH4) is intended as an early warning stage prior
to the final disconnection of the controller by means of TRIP (OH). In this way the process
can be influenced accordingly, so that a final disconnection of the controller at an
unfavourable moment is avoided. Furthermore, it is possible to activate e.g. additional
fans which would generate an unacceptable noise nuisance when operated continuously.
Code
Possible settings
IMPORTANT
No.
Designation
Lenze/
{Appl.}
Selection
C0122 OH4 limit
80
Threshold for heatsink
temperature monitoring
204
45
{1
°
C}
90 Heatsink temperature
> C0122
ð
fault message OH4
(C0582)
C0582 MONIT OH4
2
Setting of the fault response −
monitoring of heatsink
temperature in C0122
204
0
TRIP
2
Warning
3
Off
The following causes can bring about an actuation of the monitoring process:
Cause
Remedy
The ambient temperature is too high.
Mount a fan in the control cabinet.
The drive controller is overloaded in the arithmetic
mean, i. e. overload and recovery phase are above
100%.
l
Mount a fan in the control cabinet.
l
Reduce overload phase.
l
Use more powerful drive controller.
