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3 SPECIFICATION
MELSEC-QnA
(16) Module reset request: Yn4
Signal used to reset the module for debugging.
The module can be reset individually without resetting the programmable
controller CPU.
If you cannot start the remote station earlier than starting the system in any
method, resetting the module after the start of the remote station allows the
system to start from the initial status securely.
Refer to (5) for signal timing.
(17) Data link startup request from buffer memory parameter: Yn6
Starts data link according to the parameter (address 0H to 5FH) contents in buffer
memory.
Do not turn on this signal during RUN of the programmable controller CPU and
during a data link.
If you are going to change any parameter data during RUN of the programmable
controller CPU and during a data link, always turn on SB0002 (data link stop) to
stop the data link, change the parameter data, and then turn on this signal to
restart the data link.
Refer to (6) and (7) for signal timing.
(18) Data link startup request from E
2
PROM parameter: Yn8
Starts data link according to the parameter contents registered in E
2
PROM.
Do not turn on this signal during RUN of the programmable controller CPU and
during a data link.
If you are going to change any parameter data during RUN of the programmable
controller CPU and during a data link, always turn on SB0002 (data link stop) to
stop the data link, change the parameter data, and then turn on this signal to
restart the data link.
Refer to (8) and (9) for signal timing.
POINT
The factory-set E
2
PROM values are inconsistent.
Before executing a data link start with the Yn8 signal, always execute parameter
registration with the YnA signal at least once.
(19) Parameter registration request to E
2
PROM: YnA
The signal for registering parameter (address 0H to 5FH) in buffer memory to
E
2
PROM.
Refer to (10) and (11) for signal timing.
Since parameter registration to E
2
PROM is limited to 10,000 times, execute
parameter registration with the YnA signal a minimum required number of times.
(20) E
2
PROM erasure request: YnD
The signal for erasing the parameters in the E
2
PROM.
Refer to (12) and (13) for the signal timing.