System Registers; What Are System Registers - Panasonic FP-M Hardware Manual

8-5. System Registers

1. What Are System Registers

• The FP series programmable controller is configured by setting certain parameters. The parameters, which
configure the system and special functions, are called system registers.
• Like other registers in the FP series programmable controller, each system register consists of 16 bits. System
register addresses are also assigned to each of the system registers.
Summarizing the functions of system registers
By function, system registers of the FP series programmable controller are classified into 8 types, as follows:
1 System register 0:
2 System registers 5, 6, 7, 8, and 14:
3 System registers 4, 20, and 26:
4 System registers 31 and 34:
5 System registers 400, 402, and 403: Input mode settings.
6 System registers 404 through 407: Input time filtering settings.
7 System registers 410 and 411:
8 System registers 412 through 418: Communication settings of RS232C serial port.
Size prepared for program capacity (fixed).
The value in this system register cannot be changed when you use an
FP-M.
You can use it only for monitoring the program capacity of the FP-M.
Characteristics settings of the area for timer/counter
instructions and operands.
Performs assignments for numbers of timers/counters and the
hold/non-hold area.
Operation settings when abnormality is detected.
Sets whether the duplicated use of output and a low battery are to be
regarded as errors, or whether the programmable controller should
execute a program when an operation error occurs.
Processing time settings.
Sets the scan time of the programmable controller and the waiting time
of computer link communication.
Performs settings of the inputs, such as high-speed counter input, pulse
catch inputs, and interrupt inputs.
Sets the input time constants in 8-input units.
Communication settings of port for programming tools
(RS422).
Sets the station number, the character length, and the modem
compatibility for the programming port.
Sets the communication specifications of the RS232C serial port, such
as communication mode, data format, and modem compatibility.

8-5. System Registers

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