9.392 NAIS-FP-Alarm-Circuit

This page describes the device driver and the device window for the NAIS-FP-Alarm-Circuit device. This device monitors an alarm contact through an input port of a NAiS/Matsushita FPx programmable logic controller. The NAIS-FP-Alarm-Circuit device raises an alarm if the contact is opened, i.e. no current flows through the PLC input:

There also is a NAIS-FP-Inv-Alarm-Circuit device available, which provides an inverted sense.

Multiple devices of this type (and other members of the NAIS-FP-* -family) may refer to one single PLC device. To do so, configure these devices to share the serial interface of the PLC and set the configuration parameters of each particular switch/monitoring device to the same PLC (address) but to individual ports.

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 .

• --- This page is empty. It is contained for compatibility to other switch/monitoring devices of the NAIS-FP-* family.
• --- 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.

Remarks

• The device address of a FPx PLC usually is "01" (two digit, the leading zero is mandatory).
• Port addresses used with the PLC are 4 digit hex numbers (upper case digits 'A'..'F', always padded to 4 characters with leading zeroes). The ports on a FPx device itself start at "0000" (inputs and output use their own address spaces). See the PLC manual for the addresses of I/O ports located at extension modules.
• The FPx PLC must be switched to "RUN" mode. It will not reply in "PGM" mode.
• The M&C software uses the PLC as a "dumb" I/O device. It assumes that no program is loaded to the PLC (you can use it "out of the box"). If you need to run a program on the same PLC device anyhow, ensure that the program does not access the same I/O registers the M&C addresses.
• The fault message written by this device to the event log is named "XXXXXX Circuit FAULT" with XXXXXX being the name of the device.

Variables defined by this device driver