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1 OVERVIEW
MELSEC-QnA
(10) Parameter registration to the E
2
PROM
By registering the parameters to the E
2
PROM, the parameter settings do not
have to be performed at each master station startup (power off
on).
Because this is the E
2
PROM, parameters are stored even if the module's power
is turned off.
SET YnA
TO
SET Yn8
Buffer memory
Parameter
information area
Internal memory
The data link is executed using the parameters
registered in the internal memory.
1
2
3
Programmable controller CPU Master station
EPROM
2
(11) Data-link status setting for when a master station programmable
controller CPU error occurs
The data-link status can be set (stop/continue) to either stop or continue for when
a "operation stop error" occurs at the master station's programmable controller
CPU, such as SP. UNIT ERROR.
The data link between local stations can be continued.
"Operation continue errors" such as a BATTERY ERROR continue the data link
regardless of the setting.
(12) Input data from data-link faulty station status setting
The data input (received) from the data-link faulty station can be cleared or kept
(status right before an error is caused).
(13) Module reset function from the sequence program
When the switch setting is changed or an error occurs in the module, the module
can be reset from the sequence program without resetting the programmable
controller CPU.
(This excludes when the module has a module faulty (Xn0 is on).)
(14) RAS function
(a) Automatic return function
When a station is disconnected from the link due to power off, etc., and
returns to the normal status, the station can join the data link again
automatically.
(b) Link status check
Using the link special relay (SB) and link special register (SW) in the buffer
memory, the current data-link status can be checked.
(c) Diagnosis function
Using the switch setting, the hardware and cable conditions can be
checked.