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General command receiving sequence is as follows:
Figure 11.5-10 Command receiving sequence
In the transmission format of General command (Type ID=20), customized items are shown
in Table 11.5-10.
Oct.
1
Start
2
Length
3
Length
4
Start
5
Control field
6
Address
7
Type identification (Type ID)
8
Variable structure qualifier
9
Cause of transmission (COT)
10
Common address of ASDU
11
Function type (FUN)
12
Information number (INF)
13
Double command (DCO)
14
Return Information identifier (RII)
15
Checksum
16
End
In the transmission format of Command ACK/NACK (Type ID=1), customized items are
shown in Table 11.5-11. The frame type of Command ACK/NACK is Time-tagged message.
Table 11.5-11
Oct.
1
Start
2
Length
3
Length
Primary
station
General
Command
Class 1
Command
ACK/NACK
Table 11.5-10
General command (Type ID=20)
Item
Time-tagged message (Type ID=1)
Item
- 960 -
Secondary
station
ACK
Value
68H
10
10
68H
73H/53H
1-254
Setting from the relay
20
81H
20
1-254
Linked with Address setting
0-255
0-255
Customized by the GR-TIEMS
1/2
0-65535
16H
Value
68H
14
14
6F2T0207 (0.01)
Remarks
Remarks
GRE200 (5,6)
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