Panasonic FP Series User Manual

Basics
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R9040 and the special data registers DT90400 to DT90422.
When all error alarm relays are set to FALSE, R9040 will be set to FALSE.
To monitor alarm relays using Control FPWIN Pro: Monitor  Special Relays and Registers  Alarm
Relays.
1.2.5.1 Restrictions of error alarm relays
There is no limit to the number of times an error alarm relay can be used in a program. However, if one error
alarm relay is used with different error conditions in more than one error alarm program it will not be possible to
accurately determine the nature of the error. The CPU does not check for multiple use.
When the power is turned OFF or when switching between PROG. and RUN, the error relays as well as the
affected special data registers are held. To reset the error relays and the special data registers, you have to
press up the initialize/test switch in PROG. mode.
However, in system register 4, bit 10 (Error alarm relay) can be set to "Clear not" to ensure that no error alarm
relays are turned OFF when the initialize/test switch is pressed up. Then only the next download of the program
will reset the error relays and the corresponding special data registers.
1.2.6 Pulse relays (P)
A pulse relay (P) goes ON for one scan only. The ON/OFF state is not externally output and only operates in the
program.
A pulse relay only goes on when a rising edge start instruction or a falling edge start instruction is executed.
When used as the trigger, a pulse relay only operates during one scan when a leading edge or trailing edge is
detected.
Example: Declared globally
GVL:
POU Header
Execution with a rising edge:

Panasonic FP Series Specifications

General

Mounting	DIN rail
Type	PLC
Communication Interface	RS-232, RS-485, Ethernet (depending on model)
Input Voltage	100-240V AC or 24V DC (depending on model)
Output Type	Relay, Transistor
I/O Points	Varies by model
Operating Temperature	0°C to 55°C
Dimensions	Varies by model
Weight	Varies by model