IL PB BK DI8 DO4/EF-PAC
3-18
PHOENIX CONTACT
7725_en_01
3.5.2
Examples for VC1 services
Example 1:
Reading the connected local PCP devices and their status
(slot 0, index 5 on the bus coupler)
The status byte equals zero. This means that communication was error-free. The data
shows that there is one PCP device each on slot 3 and 4, and its connection status is OK,
see Section "Object dictionaries" on page B-1.
The communication data can be reset to the initial state via "Clear".
Read request (master -> slave)
Data (8 words VC1)
Data structure
03 00 00 00 05 00 I 00 00 00 00 00 00
00 00 00 00
Read request (bus coupler)/Slot/Invoke ID/
Index high/Index low/Subindex/
10 bytes unused
Read response (slave -> master)
Data (8 words VC1)
Data structure
83 00 06 03 01 00 04 01 00 I 00 00 00
00 00 00 00
Read response (bus coupler)/Status/Actual
length/6 bytes of object data/7 bytes unused
Clear request (master -> slave)
Data (8 words VC1)
Data structure
00 I 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00
Clear request/15 bytes unused
Clear response (slave -> master)
Data (8 words VC1)
Data structure
00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00
Clear response
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