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The status bits are coded as follows:
Table 5- 10
Value
00
01
10
11
5.1.5
DP diagnostics frames when the CPU is in STOP
DP diagnostics frames when the CPU is in STOP
All diagnostics frames from DPV0 standard slaves and all DP interrupt frames from DP-
S7/DPV1 standard slaves arriving when the CPU is in STOP are forwarded to the CPU. During
module startup, the diagnostics frames must then be evaluated by a suitable user program.
5.2
Maintenance
Hot surfaces
Risk of burns during maintenance work on parts with a surface temperature above 70 °C
(158 °F).
• Take appropriate protective measures, for example, wear protective gloves.
• Once maintenance work is complete, restore the touch protection measures.
Cleaning the housing
• In hazardous areas
• In non-hazardous areas
Do not use any liquids or solvents.
Unauthorized repair of devices in explosion-proof design
Risk of explosion in hazardous areas
• Repair work may only be performed by personnel authorized by Siemens.
SIMATIC CP 1542-5
Equipment Manual, 01/2023, C79000-G8976-C326-05
Meaning of the values of the status bits
Meaning
Data valid
Data invalid - error (for example short-circuit)
Data invalid - wrong module
Data invalid - no module plugged in
CAUTION
WARNING
Only clean the outer parts of the housing with a damp, but not wet, cloth.
Only clean the outer parts of the housing with a dry cloth.
WARNING
Diagnostics and maintenance
5.2 Maintenance
37
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