Messages
Section 6-4
78
6-4-1
Control command
This command can also be issued via the control words (see section 5-3-1).
The message for a control command is shown below.
MSB
LSB
word n
03h
10h
word n+1
03h
00h
word n+2
00h
00h
word n+3
46h
00h
word n+4
Station address
(00h ~ 7Fh)
Control command
word n+5
Group select
(00h ~ FFh)
00h
The message consists of 6 words which have to be prepared in a PLC data
area.
Station address and Group select are described in the paragraph on control
word IR n+1 (see section 5-3-1).
The settings in the Control command byte define which control command is to
be sent; see table below.
Command priority
No response message
When issued simultaneously, Unsync has priority over Sync, and Unfreeze
has priority over Freeze.
The Clear_Data command will always clear the output data, independent
whether the Freeze command is activated or not.
The response message does not contain any valuable information and is
therefore removed from the Input mailbox automatically. It is not necessary to
issue an IORD command.
Bit
Command
Meaning
0
-
-
1
Clear_Data
Clear output data
2
Unfreeze
Unfreeze input data
3
Freeze
Freeze input data
4
Unsync
Unsynchronise output data
5
Sync
Synchronise output data
6
-
-
7
-
-
Содержание C200HW-PRM21
Страница 1: ...C200HW PRM21 PROFIBUS DP Master Unit OPERATION MANUAL Cat No W349 E2 2...
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