Monitoring functions
Configuring monitoring functions
Motor temperature monitoring (OH3, OH7)
202
EDBCSXS064 EN 4.0
9.3.5
Motor temperature monitoring (OH3, OH7)
Stop!
The temperature sensor must only be connected to either X7
or
X8, the other
input of the temperature sensor must be left open!
Note!
This monitoring function only applies to temperature sensors specified by
Lenze like the ones used on standard Lenze servo motors.
With regard to default setting, this monitoring is switched actively and is
actuated when no Lenze servo motor is used!
The motor temperature is monitored by means of a continuous KTY temperature sensor.
The motor temperature monitoring functions (OH3/OH7) respond when the set
temperature thresholds are exceeded.
Wire the KTY temperature sensor to the resolver cable at X7 (
at X8 (
Fault message
Monitoring function
System variable
Possible response
TRIP
Messag
e
Warnin
g
Off
053
OH3
Motor temperature
(fixed, 150 °C)
MCTRL_bMotorTempGreaterSet
Value_b
·
ü
ü
057
OH7
Motor temperature
(adjustable, C0121)
MCTRL_bMotorTempGreaterC0
121_b
ü
·
ü
·
Default setting
ü
Setting possible
ƒ
Adjustable warning threshold (OH7)
– The warning threshold can be set under C0121
– The reaction to exceeding the threshold can be set under C0584
ƒ
Fixed warning threshold (OH3)
– Threshold = 150 °C
– The reaction to exceeding the threshold can be set under C0583
The hysteresis is 15 K, i.e. the switching value for the fixed warning threshold is 135 °C.
Monitoring with the adjustable threshold (OH7) is intended as an early warning stage prior
to the final disconnection of the controller by means of TRIP (OH3). 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
C0121 OH7 limit
120
Threshold for motor temperature
monitoring
202
45
{1
°
C}
150 Motor temperature > C0121
ð
fault message OH7 (C0584)
