
Error Diagnosis IM 308-B
99
05/01 AWB2700-1384GB
9
Solution
X
Operate PLC without battery. Acknowledge delay is not stored.
X
Operate IM 308B without acknowledge delay and monitor in
cycles
X
Program measures for the acknowledge delay in the OBs
h
In an installation a PLC start-up problem occured when the
installation was switched off via the main switch. The PLC did
not restart because an acknowledge delay occured that is
programmed by the master interface module IM 308B. This
acknowledge delay is important in order to avoid a certain state
in the installation when a slave fails when no cyclic monitoring
of the IM 308B has been programmed.
The start-up problems above did not occur when the installation
was manually started and when the PLC power supply was
switched on and off.
The acknowledge delay during start-up was caused by the
following reason:
When the installation is switched off, the general power supply
is initially interrupted which also supplies the DP slaves. One
second later, the power supply of the PLC is interrupted. That
means, before the PLC is switched off, there is enough time for a
station failure to be noted and an acknowledge delay to be sent
to the CPU. Because this message is not acknowledged, the error
is still present at start-up. Therefore the PLC does not start and
must be manually started.
Содержание DP-16DI-ECO
Страница 12: ...8 05 01 AWB2700 1384GB ...
Страница 16: ...12 05 01 AWB2700 1384GB ...
Страница 18: ...Project Planning 14 05 01 AWB2700 1384GB WINbloc eco Dimensions 142 mm 90 mm complete 340 g 550 gG 15 ...
Страница 24: ...20 05 01 AWB2700 1384GB ...
Страница 45: ...Wiring Guide 41 05 01 AWB2700 1384GB 3 ZSBE 1 5 25 S PE With one supply for each group of 8 inputs ...
Страница 49: ...Wiring Guide 45 05 01 AWB2700 1384GB 3 ZSBE 1 5 25 2S PE 2 With one supply for each group of 8 inputs ...
Страница 52: ...Mounting Dismounting 48 05 01 AWB2700 1384GB ZSBE 1 5 25 S PE The supplies can be cross connected using a ZQV ...
Страница 62: ...58 05 01 AWB2700 1384GB ...
Страница 73: ...EMC Suitable Wiring 69 05 01 AWB2700 1384GB 5 Figure 26 Routing of potential compensation line and signal line ...
Страница 91: ...Device Data Sets and Type Files 87 05 01 AWB2700 1384GB 9 ...
Страница 109: ...Diagnostic Possibilities with S7 and PB DP 105 05 01 AWB2700 1384GB 9 ...
Страница 120: ...116 05 01 AWB2700 1384GB ...
Страница 146: ...142 05 01 AWB2700 1384GB ...
Страница 150: ...05 01 AWB2700 1384GB 146 ...