Omron CJ1W-FLN22, Руководство по эксплуатации, Страница: 126 / 277

Sending Commands from a PLC Section 7-2
100
Communications Flags The execution status of the SEND(090), RECV(098), and CMND(490) instruc-
tions is always reflected by the communications flags (i.e., the Communica-
tions Port Enabled Flag and the Communications Port Error Flag). The CS-
series CPU Unit’s communications flags are allocated in the Auxiliary Area as
shown in the following table.
Note With CS/CJ-series PLCs, communications ports 0 to 7 are also used for exe-
cuting the PLCMR(260) (PROTOCOL MACRO) instruction, so these flags are
used in common for SEND(090), RECV(098), CMND(490), and PLCMR(260).
While PLCMR(260) is being executed, SEND(090), RECV(098), and
CMND(490) cannot be executed at the same communications port.
Execution
condition
Communications
Port Enabled Flag
KEEP(011) A
Reset B
Input A remains ON from start to completion of commu-
nications instruction.
Local Node Network
Participation Flag
Operand,
control data
created with
@MOV and
@XFER.
Creates operand and control data in a given
area.
Communications
Port Enabled Flag
DIFU(013) B
Executes communications instructions.
Communications
Port Error Flag
Reset D
Communications
Port Enabled Flag
KEEP(011) C
Creates reset input. (Turns reset B ON
after execution of communications in-
struction.)
Exclusive control so execution is not simultaneous.
Use exclusive control so that no other communica-
tions instructions are started before execution of the
above communications instruction is complete.
(Continued in same way.)
Remote Node Network
Participation Flag
Execution
condition
Communications
instructions
@SEND
@RECV
@CMND
Send Error Flag display
(Retry can be executed.)
Flag name Address Contents
Word Bits
Communications Port
Enabled Flag A202 Bit 7: Port 7
Bit 6: Port 6
Bit 5: Port 5
Bit 4: Port 4
Bit 3: Port 3
Bit 2: Port 2
Bit 1: Port 1
Bit 0: Port 0 OFF: Execution enabled
(being executed)
ON: Execution disabled
(not being executed)
Communications Port
Error Flag A219 Bit 7: Port 7
Bit 6: Port 6
Bit 5: Port 5
Bit 4: Port 4
Bit 3: Port 3
Bit 2: Port 2
Bit 1: Port 1
Bit 0: Port 0 OFF: Normal completion
ON: Abnormal completion