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WR904 (specified in word)
Relay
number
R9040
COM0 port operation mode flag
(R9131)
R9041
COM1 port PC (PLC) link flag
(R913E)
R9042
COM2 port operation mode flag
(R9141)
R9043
Unused
COM1 port
R9044
SEND / RECV instruction
(R913C)
executable flag
COM1 port
R9045
SEND / RECV instruction
(R913D)
execution completion flag
R9046
Unused
R9047
COM2 port communication error
(R9140)
flag
Reception completion flag for
R9048
COM2 port general-purpose
(R9142)
communication
Sending completion flag for
R9049
COM2 port general-purpose
(R9143)
communication
COM2 port
R904A
SEND / RECV instruction
(R9144)
executable flag
COM2 port
R904B
SEND / RECV instruction
(R9145)
execution completion flag
R904C-
Unused
R904F
(Note 1): R9040 - R904F will change even during a scanning cycle. In addition, the special internal relay in
parentheses is also allocated the same function.
WR905 (specified in word)
Relay
number
MEWNET-W0
R9050
PC (PLC) link transmission error
flag
R9051-
Unused
R905F
Name
When using the general-purpose communication function, it is
ON.
When using a function outside of the general-purpose
communication function, it is OFF.
When using the PC (PLC) link function, it is ON.
When using the general-purpose communication function, it is
ON.
When using a function outside of the general-purpose
communication function, it is OFF.
Indicates the instruction with respect to the F145 (SEND) or
F146 (RECV) instruction of the COM1 port is executable /
non-executable.
OFF: non-executable (instruction executing)
ON: executable
Indicates the status with respect to the F145 (SEND) or F146
(RECV) instruction of the COM1 port.
OFF: normal completion
ON: abnormal completion (a communication error occurs)
The error code is stored to DT90124.
When performing data communication, if a transmission error
occurs, it is ON.
When requesting for sending via the F159 (MTRN)
instruction, it is OFF.
For general communication, if the end character is received, it
is ON.
For general-purpose communication, if end the transmission,
it is ON.
For general-purpose communication, if transmitting is
required, it is OFF.
Indicates the instruction with respect to the F145 (SEND) or
F146 (RECV) instruction of the COM2 port is executable /
non-executable.
OFF: non-executable (instruction executing)
ON: executable
Indicates the status with respect to the F145 (SEND) or F146
(RECV) instruction of the COM2 port.
OFF: normal completion
ON: abnormal completion (a communication error occurs)
The error code is stored to DT90125.
Name
When using MEWNET-W0
When a transmission error sent through the PC (PLC) link, it is ON.
When the setting of the PC (PLC) link area is abnormal, it is ON.
26.6 Table of Special Internal Relays
Description
Description
26-69
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