Data Exchange with the SM 335
3-33
SM 335 – High-Speed Analog Input/Output Module for the SIMATIC S7-300
6ES7 335-7HG00-8BA1
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.
Group fault
Internal fault
External fault
Channel fault
No 24 V load voltage
SM 335 not initialized
Invalid parameters
76543210
Fig. 3-11 Module diagnostic byte 1
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
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