Burkert Type 8644 - Manual (Page 64)

60 - 8644/phoenix
S
YSTEM
D
ESCRIPTION
Clear Request (Master Slave)
Clear Response (Slave Master)
An error is signalled in the read response of the start fragment with 0x44. 06 and 07 in this case are the
error codes which, in accordance with PCP description, show that the addressed index does not exist.
Example 6
Error: Non-existent object read on an E/A module without PCP functionality (access to 5FF0, sub-index 0 to
a DO8, slot 2)
Read Request (Master Slave)
Read Response (Slave Master)
Clear Request (Master Slave)
Clear Response (Slave Master)
An error is displayed in the read response via 0xD2. Basically, it can be said that an error has occurred if
the MSB is set in the second byte or 0x44 appears int he second byte (see also example 5).
Example 7
Fragmented read on IL RS232, slot 3, object 5FFF, sub-index 0 (additional example)
Read Request (Master Slave)
Read Response (Slave Master)
Data Configuration of the data
5E 03 30 28 Read/Slot/Index/max. Length
Data (4 words VC1) Configuration of the data
00 00 00 00 00 00 00 00 Clear Response
Data (4 words VC1) Configuration of the data
01 02 5F F0 00 | 00 00 00 Read-PCP / Slot / Index high / Index low / Sub-index | 3 Byte unused
Data (4 words VC1) Configuration of the data
81 D2 00 | 00 00 00 00 00 Read-Response / 2 Byte Error Code | 5 Byte unused
Data (4 words VC1) Configuration of the data
00 00 00 00 00 00 00 00 Clear Response
Data (4 words VC1) Configuration of the data
00 xx xx xx xx xx xx xx Clear
Data (4 words VC1) Configuration of the data
01 03 5F FF 00 | 00 00 00 Read-PCP / Slot / Index high / Index low / Sub-index | 3 Byte unused
Data (4 words VC1) Configuration of the data
91 00 14 00 07 02 00 00 Read-Response / Status / Actual length / 5 Byte Object data