
8. PROGRAMMING
MELSEC-A
8-5
8.5
Global Control
Following is shown an example of when a global control service (SYNC) is transmitted to each slave
station in groups 1 and 2. (For information regarding service commands refer to Section 4.3.2.9.)
X0D
Communication
READY
X1B
Module
READY
X1D
X0D
Communication
READY
X1B
Module
READY
X1D
Exchanging
X00
Exchange
start
Y00
Global control
request instruction
Global control
request instruction
X04
Y04
X04
TOP
H0
K2081
H0320
K1
SET
Y04
RST
Y04
RST "Global control request instruction"
H03** shows groups 1 and 2.
H**20 shows the SYNC.
Watchdog
timer error
Watchdog
timer error
Global
control end
Global
control end
Global control
request