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6
FUNCTIONS
CHAPTER6 FUNCTIONS
Function of CPU module is as follows:
6.1 Function List
Functions of CPU module are listed in Table6.1.
The Nos. in the "CPU module" field correspond to the CPU modules as indicated below.
Item
Safety CPU operation mode
CPU access password
PLC memory initialization
Setting for preventing continuous RUN
in TEST MODE
ROM write count check
Self-Diagnosis function
Operation/error history
Constant scan
Output status selection function for
transition from STOP status to RUN
status
Clock function
Remote RUN/STOP
Remote RESET
Monitoring function
Online change
Watchdog timer
Remote password
System display
LED display
Table6.1 CPU module function list
Description
Selects whether to normally operate the CPU module as
part of the safety device or to carry out maintenance on
the CPU module using program changes and device
test functions.
Prevents incorrect operations from GX Developer
connected by mistake.
Erases user data written to the CPU module. When the
PLC memory is initialized, data is returned to its factory
settings status.
Prevents the PLC system from running continuously for
long periods in TEST MODE.
Checks the number of writing to ROM.
Enables the CPU module to check for failures.
Records the the operations that have been executed to
the CPU module from the outside and the self-
diagnostics errors that have occurred in the CPU
module in the past.
Executes the program at a constant frequency.
Selects the output Y status (output before STOP/output
after the calculation execution) when the CPU module is
set from STOP status to RUN status.
Executes the CPU module internal clock.
Stops and starts operating the CPU module.
Resets the CPU module when the CPU module is in a
STOP status.
Monitors the status of programs and devices on the
CPU module by operating from the GX Developer.
Writes programs when the CPU module is in the RUN
status.
Monitors operational delays caused by CPU module's
hardware and program errors.
Prevents an illegal access using the Ethernet module.
Connects to the GX Developer and monitors system
configuration.
Enables the front-mounted LEDs to indicate the
operating conditions of the CPU module.
Safety CPU operation
mode
Reference
SAFETY
TEST
MODE
MODE
Section 6.2
Section 6.3
Section 6.4
Section 6.5
Section 6.6
Section 6.7
Section 6.8
Section 6.9
Section
6.10
Section
6.11
Section
6.12.1
Section
6.12.2
Section
6.13
Section
6.14
Section
6.15
Section
6.16
Section
6.17
Section
6.18
: Available
6.1 Function List
1
2
3
4
5
6
7
8
: N/A
6
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