System Registers; Precautions When Setting System Registers; Types Of System Registers - Panasonic FP0R User Manual

Appendix

12.4 System Registers

System registers are used to set values (parameters) which determine operation ranges and
functions used. Set values based on the use and specifications of your program. There is no
need to set system registers for functions which will not be used.

12.4.1 Precautions When Setting System Registers

System register settings are effective from the time they are set.
However, MEWNET-W0 PLC link settings, input settings, TOOL and COM port
communication settings become effective when the mode is changed from PROG to RUN.
With regard to the modem connection setting, when the power is turned off and on or when
the mode is changed from PROG to RUN, the PLC sends a command to the modem which
enables it for reception.
After an initialization with Online  Clear Program and Reset System Register, all system
register values (parameters) set will be reset to their default values.

12.4.2 Types of System Registers

Memory size (system register 0)
Set the size of the memory area for the user program.
Hold on/off (system registers 5–8, 10–14)
Use these system registers to specify the hold area start addresses for relays and registers.
Hold areas are not cleared to 0 when the PLC is switched to PROG mode or when the power
is turned off.
The memory area for timer relays and counter relays is partitioned using system register no.
5. Specify the start address for the counter relays.
Act on Error (system registers 4, 20, 23, 26)
Set the operation mode to be chosen after errors such as an operation error, a battery error,
or an I/O verification error.
Time-Out (system registers 30–32, 34)
Set the waiting time before an error is output. You can also specify a constant scan time.
PLC Link (system registers 40–47, 50–55, 57)
These settings are for using link relays and link registers in MEWNET-W0 PLC link
communication. Note that PLC Link is not the default setting.
High-Speed Counter, Pulse-Catch Input, Interrupt Input (system registers 400–405)
When using the high-speed counter function, pulse catch function or interrupt function, set the
operation mode and the input number to be used for the function.
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