Universal Device Driver Reference Manual

1.396 NAIS-FP-Protection-Switch

This page describes the device driver and the device window for the NAIS-FP-Protection-Switch device. This device controls a NAiS/Matsushita PLC running a program that implements a 1:1 protection switch. The PLC recognizes several device alarms and controls a waveguide switch. The driver exclusively works with a PLC programmed in this special way.

Device window pages

The following table shows which device window pages are available with this individual device type. Tool-bar functions not mentioned here are described at the general description of device windows .

--- Contains the global Enable/Disable switch for the protection.
--- The faults page.
--- The device info page.
--- The maintenance page. The configuration parameters described below are set at this page.

Configuration parameters

At the maintenance page of the device window there are a couple of configuration parameters which must be set to make the software talk to the alarm monitoring input at the PLC.

parameter	description
address	The packet address of the PLC device. Usually this is "01".
operationMode	Defines if the protection shall be disabled after it has been triggered once.
Serial	Remember to set the line parameters for the serial interface connected to the FPx PLC device. It requires the somewhat unusual setting 9600,O,8,1 . With multiple NAIS-FP-* -devices referring to the same PLC, the line speed needs to be setup only once.

Remarks

The device address of a FPx PLC usually is "01" (two digit, the leading zero is mandatory).
The FPx PLC must be switched to "RUN" mode. It will not work in "PGM" mode.
The wave guide switch is operated at the I/O terminals 0000/0001 of the PLC. To control the switch position directly you may define a NAIS-FP-Latching-Relay device on these ports.

Variables defined by this device driver

name	type	flags	range
info.driver	TEXT	R/O	StringRange R/O
lowLevel.cmd	TEXT		StringRange
lowLevel.reply	TEXT	R/O	StringRange R/O
faults.99	ALARM	R/O	AlarmFlagRange R/O (Communication)
faults.commstat	TEXT	R/O	StringRange R/O
info.type	TEXT	R/O	StringRange R/O
info.port	TEXT	R/O	StringRange R/O
info.frame	TEXT	R/O	StringRange R/O
config.operationMode	CHOICE	SETUP	EnumRange (SW-ONCE SW-ALWAYS)
position	CHOICE		EnumRange (ENABLED DISABLED)
reset	TEXT		StringRange
faults.01	ALARM	R/O	AlarmFlagRange R/O (WG switch)
faults.02	ALARM	R/O	AlarmFlagRange R/O (FP0 program)
faults.03	ALARM	R/O	AlarmFlagRange R/O (Has switched)