Bosch CL400 - Retension Switch

Flexible Automation
Central processing unit ZS400
4-13
1070 072 143-101
4.1.3 Retention switch
The ZS400 distinguishes the following modes:
D Retention
D No retention
The mode selection is made with the retention switch on the front panel of
the ZS400.
Retention switch
Fig. 4-9 Retention switch
D upper switch setting: Retention
D lower switch setting: No retention
The scope of ranges set to retentive for markers, counters, timers and data
buffers is set with the PLC service program in organisation module OM2.
The limits between retentive and nonretentive ranges set in OM2 can be
amended in the startup blocks OM5 and OM7.
. The setting of the retention switch has no effect on the data field.
Retention
ZS400 startup is performed with the retentive data of markers, counters,
timers, data buffers and fixings.
The ranges defined as nonretentive in OM2 are deleted before ZS400
startup.
. A buffer battery is required in the power supply module for retention
mode.
No retention
When restarting the ZS400 from stop mode or cold starting after switching
on the power supply module, all markers, counters, timers, fixings and data
buffers are deleted.