System Registers / Special Internal Relays / Special Data Registers - Panasonic AFPX-C30R User Manual

17.1 System Registers / Special Internal Relays / Special
Data Registers
Precaution for System Registers
What is the system register area
• 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.
Type of system registers
The registers to be used depend on each PLC.
1. Allocation of timers and counters (System registers 5)
The number of timers and counters is set by specifying the starting counter number.
2. Hold/non-hold type setting (System registers 6 to 13)
When these registers are set to "hold type", the values in the relays and data memory will be retained
even if the system is switched to PROG. mode or the power is turned off. If set to "non-hold type" the
values will be cleared to "0".
3. Operation mode setting on error (System registers 20, 23 and 26)
Set the operation mode when errors such as battery error, duplicated use of output, I/O verification error
and operation error occur.
4. Time settings (System registers 31 to 34)
Set time-out error detection time and the constant scan time.
5. MEWNET-W0 PC(PLC) link settings (System registers 40 to 47, 50 to 55, and 57)
These settings are for using link relays and link registers for MEWNET-W0 PC(PLC) link communication.
Note) The default value setting is "no PC(PLC) link communication".
6. Input settings (System registers 400 to 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.
7. Tool and COM ports communication settings (System registers 410 to 421)
Set these registers when the Tool port and COM ports are to be used for computer link, general-purpose
serial communication, PC(PLC) link, and modem communication.
8. Input time constant settings (System registers 430 to 433)
Changing the input signal width to be loaded enables to prevent the malfunctions caused by chattering
or noises.
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