Module Diagnostic Byte 1 (Byte 0) - Siemens SIMATIC SM 335 Manual

3.4.3

Module diagnostic byte 1 (byte 0)

Format
The SM 335 module diagnostic byte 1 contains group error information. Byte 1 has
the format shown in Figure 3-11.
Fig. 3-11
Group fault
Bit 0 in module diagnostic byte 1 is set when the SM 335 flags an error/fault (the
only exception being: SM 335 not initialized).
Internal fault
Bit 1 is set in module diagnostic byte 1 when the SM 335 detects one of the follo-
wing:
• Watchdog
• EEPROM fault
• ADC/DAC error
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
7 6 5 4 3 2 1 0
Internal fault
External fault
Channel fault
No 24 V load voltage
SM 335 not initialized
Invalid parameters
Module diagnostic byte 1
Data Exchange with the SM 335
Group fault
3-33