Siemens SIMATIC ET 200iSP

• 01000111 (47
H
) uncertain, last usable event, constant (device is busy)
• 10000100 (84
H
) good, update event (re-con󹪝guring)
• 10000000 (80
H
) good, ok (no error)
A.4.8 Watchdog module
Address space WATCHDOG module
Table A-30 PIQ WATCHDOG module
PIQ 7 6 5 4 3 2 1 0 Description
QB x Output byte
Table A-31 Process image input for WATCHDOG module
PII 7 6 5 4 3 2 1 0 Description
IB x Input byte
Parameterizable, toggle input bit (1: green LED)
A.5 Lightning and overvoltage protection
A.5.1 Overview
Introduction
Common causes of failure include overvoltages caused by:
• atmospheric or
• electrical discharges
The concepts or measures for protection against overvoltages are based on the lightning
protection zone concept.
Appendix
A.5 Lightning and overvoltage protection
ET 200iSP
442 Operating Instructions, 11/2022, A5E00247483-AK