Siemens 420 manual Suppressing fault / alarm messages, Example

Issue 07/04 4 Troubleshooting

4.3.3Suppressing fault / alarm messages

From the perspective of the application and user, fault-free operation is the decisive criterion when it comes to the acceptance of drive systems. For special applications, not only this, but fault-free operation is required even if an overload condition exists or external events cause faults. For applications such as these (e.g. mixer systems), fault-free operation has a higher priority than the protection of the drive system.

With MICROMASTER, it is possible to suppress up to 3 fault / alarm messages using the indexed parameters P2100 and P2101. The fault / alarm messages to be suppressed (refer to Section "Fault / alarm messages") are selected using parameter P2100 while the response is entered using parameter P2101. Indices 0 - 2 of the two parameters are used to correlate between suppressing the fault / alarm messages and the response. The following settings are possible for the responses:

0No response, no display

1OFF1 stop response

2OFF2 stop response

3OFF3 stop response

4No response, only a warning

Example:

Alarm A0911 indicates that the drive has extended the ramp run-down time in order to avoid an overvoltage condition. If you wish to suppress this message, then set the following parameters:

P2100[0] = 911 (selects Alarm A0911) P2101[0] = 0 (no response, no display)

NOTE

All of the fault messages are assigned the standard response to OFF2 (refer to the fault/alarm list).

The standard responses of several fault messages, caused by the hardware - e.g. overcurrent F0001 - can neither be suppressed nor modified.

MICROMASTER 420	Operating Instructions
6SE6400-5AA00-0BP0	155