
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
Summary of Contents for CJ1W-FLN22
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Page 40: ...Precautions Section 1 6 14...
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Page 88: ...Allocated Words in the DM Area Section 4 4 62...
Page 158: ...Command Response Reference Section 7 5 132...
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Page 192: ...Inspections Section 10 6 166...
Page 218: ...192 System Configuration Appendix A...
Page 224: ...198 System Configuration Example Appendix B...
Page 270: ...244 FL net Unit Support Software Ver 1 6 Appendix F...
Page 276: ...250 International System of Units Appendix G...