CPU使用的是313C,使用了一个CP342-5作为DP主站,从站上挂1个DP-DP耦合器,1个变频器.现在DP耦合器外部已经通讯上,就是内部没有通讯上.
CP342-5的诊断信息如下:
Event 1 of 51: Event ID 16# F9C1:0702
Protocol error in miniprotocol.
Decodable error: 21020090
External error, Incoming event
(Coding: 16# F9C1 0702 0100 0000 9000 0221)


Event 2 of 51: Event ID 16# F9C1:236B
Input data length: The input data length for the DP_RECV block 4 bytes is shorter than the number of input data received by the DP master 10 bytes.
External error, Incoming event
(Coding: 16# F9C1 236B 0200 0000 0A00 0400)


Event 3 of 51: Event ID 16# F9C1:236A
Output data length: The output data length for the DP_SEND block 4 bytes is too short. The configured output data length is 89 bytes.
External error, Incoming event
(Coding: 16# F9C1 236A 0000 0000 5900 0400)


Event 4 of 51: Event ID 16# F9C1:0220
I/O enable by S7 CPU
External error, Incoming event
(Coding: 16# F9C1 0220 0200 0000 0000 0000)


Event 5 of 51: Event ID 16# F9C1:2318
DP master information for CPU.
Total length specified for the DP RECEIVE block: 10
Total length specified for the DP SEND block: 89
External error, Incoming event

CPU的诊断信息如下:
Diagnostic buffer of module CPU 313C

Order No./ Des cription Component Version
6ES7 313-5BG04-0AB0 Hardware 2
- - - Firmware V 3.3.7
Boot Loader Firmware expansion A 32.9.9

Rack: 0
Slot: 2


Serial number: S C-C9UV06362012


Event 1 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 0
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
03:55:54.008 AM 04/22/1994
(Coding: 16# 2942 017A 0020 0000 0000 0000)


Event 2 of 10: Event ID 16# 2942
I/O access error, reading
P area, word access, Access address: 4
Requested OB: I/O access error OB (OB122)
Priority class: 1
External error, Incoming event
03:55:54.008 AM 04/22/1994
(Coding: 16# 2942 017A 0020 0004 0000 0000)


Event 3 of 10: Event ID 16# 253D
SFC not loaded
SFC number: 14
Requested OB: Programming error OB (OB121)
Priority class: 1
Internal error, Incoming event
03:55:54.007 AM 04/22/1994
(Coding: 16# 253D 0179 0080 000E 0000 0000)


Event 4 of 10: Event ID 16# 253D
SFC not loaded
SFC number: 15
Requested OB: Programming error OB (OB121)
Priority class: 1
Internal error, Incoming event
03:55:54.006 AM 04/22/1994
(Coding: 16# 253D 0179 0080 000F 0000 0000)


Event 5 of 10: Event ID 16# 253D
SFC not loaded
SFC number: 15
Requested OB: Programming error OB (OB121)
Priority class: 1
Internal error, Incoming event
03:55:54.006 AM 04/22/1994
(Coding: 16# 253D 0179 0080 000F 0000 0000)


(Coding: 16# F9C1 2318 0200 0000 5900 0A00)