FieldServer Honeywell Zellweger IR-148 - Manual (Page 3)

FS-8700-102 Honeywell Zellweger IR-148-8_8-Channel Manual Page 3 of 17
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1 Honeywell Zellweger IR-148 Description
The Honeywell Infrared Gas Monitor (Model IR-148) detects solvents and gases such as HCFCs, HFCs and PFCs. IR-
148 can have 1, 4 or 8 sampling points. This InfraTox driver reports gas values, alarms and troubles for each point.
The serial driver can emulate a Client or a Server. The FieldServer and Zellweger device are connected using a RS-
485 network.
As a Client:
The driver listens passively for messages from the IR-148 unit and stores data extracted from the messages. The
driver cannot poll the IR-148 device for Data. The driver records some additional data age information (which is
stored in the FieldServer’s Data Arrays) because messages do not always contain information about all sensors and
depending on the IR-148 operational mode (e.g. Locked mode.), may never contain information other than for one
sensor.
As a Server:
The server side if this driver has been developed primarily to test the Client side driver as part of FieldServer’s QA
program. The driver sends messages reporting the state of the samples. The server driver can also be locked to
report the status/value of one particular sample channel.
It is possible to connect up to three Honeywell Zellweger units (IR-148) on one RS-485 network provided that one
unit is configured as a single point unit (IR-148 1 point), one as a 4-point unit (IR-148 4 point) and the other as an 8
point unit (IR-148 8-point). At this stage one device with 8 points and one with 4 points have been tested
seperately.
To allow for the possibility that the device is connected on a RS-485 network with other devices (such as the relay
module option) messages that are not 49 bytes long and which do not begin with 0xB1 will be ignored. The Driver
will, however, provide statistics for the ignored as well as the processed messages.
To see supported messages and the way the Driver stores Data, refer to Appendix A.1
Max Nodes Supported
FieldServer Mode Nodes Comments
Client 3 Tested only 2 Nodes (IR-148 8 Point and IR-148 4 point) on separate networks
Server 3 Developed to test Client side of the Driver.
2 Driver Scope of Supply
2.1 SUPPLIED BY FIELDSERVER TECHNOLOGIES FOR THIS DRIVER
FieldServer Technologies PART # Description
FS-8917-16
RJ45 to terminal connector cable.