Z1: NC/PLC interface signals
19.1 Various interface signals and functions (A2)
Basic Functions
1644
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
DB31, ...
DBX94.0
Motor temperature prewarning
Edge evaluation: no
Signal(s) updated: Cyclic
Signal state 1
The drive signals a "Motor temperature prewarning" to the PLC.
In this case, the motor temperature has exceeded the defined warning threshold:
MD1602 $MD_MOTOR_TEMP_WARN_LIMIT (maximum motor temperature; standard value
120 °C)
(
②
in the diagram).
If the motor temperature remains too high, after a defined time:
MD1603 $MD_MOTOR_TEMP_ALARM_TIME
(timer state, motor temperature alarm, standard value 240 s)
the drive is regeneratively braked and then the pulses are inhibited (
③
in the diagram).
Alarm 300614 is output and the interface signal:
DB10 DBX108.6 (drive ready)
is withdrawn.
If the motor temperature rises still further and the shutdown threshold defined in:
MD1607 $MD_MOTOR_TEMP_SHUTDOWN_LIMIT
(motor temperature shutdown limit, default value 155 °C)
is reached, the drive is stopped immediately (refer to
④
in the diagram).
An alarm is also output and IS "Drive Ready" canceled.
However, if the motor temperature drops back down to below the warning threshold, the IS is reset
to 0 (refer to
②
in the diagram).
Special case:
If no temperature sensor signal is measured, this is interpreted as a fault in the motor PTC
thermistor
In this case, the interface signal:
DB31, ... DBX94.0 (motor temperature prewarning)
is also set.
The procedure continues as described above.
Signal state 0
The motor temperature is below the warning threshold.
The actual motor temperature is displayed in the axis/spindle service display in the operating area
"diagnostics".
This display corresponds to the machine data:
MD1702 $MD_MOTOR_TEMPERATURE (motor temperature)
