Which products are affected?
9300EP position controller V7.0
9300ES servo controller V7.0
Eliminated function restriction
Now, the 'MONIT-OU' signal (overvoltage) is not activated before the initialisation phase has been completed when the device is switched on. As a result, it can no longer be set erroneously for a short period of time.
Which products are affected?
9300EP position controller <= V6.2
9300ES servo controller <= V6.2
What happens?
The 'MONIT-OU' signal (overvoltage) is erroneously set for a short period of time during the initialisation phase when the device is switched on.
If the MONIT-OU signal is connected to the DCTRL-TRIP-SET input for monitoring purposes it may happen that an external trip is immediately initiated when the mains is switched on.
When does the problem occur?
The problem occurs during the initialisation phase when the device is switched on.
Possible diagnostics?
The 'MONIT-OU' signal is set for a short period of time when the device is switched on.
Short-term measures/recommendations?
Do not evaluate the MONIT-OU signal before the device has signalled ready to operate once ('DCTRL-RDY' = 1).
Possible function block interconnection:
As soon as the ready to operate signal (DCTRL-RDY = 1) occurs for the first time save it by means of the FLIP1 function block. Link the MONIT-OU signal with the FLIP1-OUT via an AND block.
As a result, the MONIT-OU signal will only be processed further after the initialisation phase. Wrong signals are suppressed at the beginning.
In order to generate a time delay after switching on the device it is also possible to use a DIGDEL instead of the DCTRL-RDY and FLIP1.
Therefore, the DIGDEL is to be connected to FIXED1 and set with a delay time of approx. 2 s.
Evaluation:
The behaviour described immediately occurs during commissioning. As a result, the remedial measure mentioned before can be applied accordingly.
