FS8700-102 - Honeywell Zellweger IR-148 Serial Driver
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FieldServer Driver
FS8700-102
Honeywell Zellweger IR-148 Serial Driver
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 from IR-148 having either 1 or 8 sampling points.
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 two 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) and the other as an 8 point unit (IR-148 8-point). At this stage only one device with 8 points has been tested.
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.
|
FieldServer Mode |
Nodes |
Comments |
|
Client |
2 |
Tested only 1 node (IR-148 8 Point) per port. |
|
Server |
2 |
Developed to test Client side. |
Formal Driver Type
Passive Client & Active Server
Compatibility Matrix
|
FieldServer Model |
Compatible with this driver |
|
FS-x2010 |
Yes |
|
FS-x2011 |
Yes |
|
FS-x40 |
Yes |
|
FS-x30 |
Yes |
Connection Information
|
Connection type: |
RS-485 (Two wire, Half-Duplex) |
|
Baud Rates: |
19200 (Vendor Limitation) |
|
Data Bits: |
8 (Vendor Limitation) |
|
Stop Bits: |
1 (Vendor Limitation) |
|
Parity: |
None |
|
Multidrop Capability |
Yes |
Devices tested
|
Device |
Tested (FACTORY, SITE) |
|
Honeywell Zellweger IR-148 |
Factory (only IR-148 8 point unit) |
Connection configurations
Configure the device according to manufacturer’s instructions
*Other devices must not transmit Zellweger 49 byte messages.
Communications functions - Supported functions at a glance:
|
Message Types |
Notes |
|
Gas Value Message |
Message reports a gas value and units. |
|
Trouble Message |
Message reports a trouble for one sensor |
|
Blank Message |
Message used to flash IR-148 display |
|
Alarm Message |
Message reports an alarm (C/W/A) for one sensor |
|
Locked Point Message |
Unit is locked onto a single sample. |
|
Other 49 byte messages beginning 0xb1 |
Discarded but driver reports stats on these messages. |
|
Other 49 byte messages |
|
|
Other messages |
Data Storage
The Driver can be configured to store data in one of two ways:
a) Default : One Set of consecutive Data Array elements is used for each IR-148 Unit. One set per point/sensor.
|
Offset |
Sensor |
Contents |
Description |
|
0 |
1 |
Alarm or Trouble |
Set non-zero if alarm or a trouble has been reported. Set to zero if neither are currently being reported. |
|
1 |
1 |
Alarm Type |
0 = None 1 = Caution 2 = Warning 3 = Alarm |
|
2 |
1 |
Trouble |
0 = None 1 = Trouble |
|
3 |
1 |
Gas Value |
Gas value multiplied by 100 is stored here. When stored, if configured, scaling will be applied. |
|
4 |
1 |
Gas Units |
1st 3 bytes of gas units are written here as ASCII characters. |
|
5 |
1 |
Gas Units |
|
|
6 |
1 |
Gas Units |
|
|
7 |
1 |
State |
0 = Enabled 1 = Disabled |
|
8 |
1 |
Gas Value Valid |
1 = Gas Value updated with most recent message. 0 = Gas Value not updated. |
|
9 |
1 |
Gas Value Age |
In seconds since last update. Initial (and max) value = 0xffff |
|
10 |
1 |
Sensor Data Age |
Time since last message containing data about this sensor in seconds since last update. Initial (and max) value = 0xffff |
|
11..21 |
2 |
|
|
|
22..32 |
3 |
|
|
|
33..43 |
4 |
|
|
|
44..54 |
5 |
|
|
|
55..65 |
6 |
|
|
|
66..76 |
7 |
|
|
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77..87 |
8 |
|
|
b) Extended storage : If the FieldServer is configured to use extended storage then data will be stored as below
|
Offset |
Sensor |
Contents |
Description |
|
0 |
1 |
Alarm or Trouble |
Non-zero if alarm or a trouble has been reported. Zero if neither are currently being reported. |
|
1 |
1 |
Alarm Type |
0 = None, 1 = Caution, 2 = Warning, 3 = Alarm |
|
2 |
1 |
Trouble |
0=None, 1=Trouble |
|
3 |
1 |
Gas Value |
Gas value multiplied by 100 is stored here. When stored, if configured, scaling will be applied. |
|
4 |
1 |
Gas Units |
1st 3 bytes of gas units are written here as ASCII characters. |
|
5 |
1 |
Gas Units |
|
|
6 |
1 |
Gas Units |
|
|
7 |
1 |
State |
0 = Enabled, 1 = Disabled |
|
8 |
1 |
Gas Value Valid |
1 = Gas Value updated with most recent message. 0 = Gas Value not updated. |
|
9 |
1 |
Gas Value Age |
In seconds since last update. Initial (and max) value = 0xffff |
|
10 |
1 |
Sensor Data Age |
Age since last message, containing data from this sensor in seconds. Initial (and max) value = 0xffff |
|
11 |
1 |
I/O State |
255 = unknown, 0=Warm up, 1 = Ready, 2 = Trouble, 3= Cal/Setup |
|
12 |
1 |
Alarm Latched Status |
0=No, 1=Yes |
|
13 |
1 |
Audion On Status |
0=No, 1= Yes |
|
14 |
1 |
Alarm Latching Preference |
On Caution (0=No, 1= Yes) |
|
15 |
1 |
Alarm Latching Preference |
On Warning(0=No, 1= Yes) |
|
16 |
1 |
Alarm Latching Preference |
On Alarm(0=No, 1= Yes) |
|
17 |
1 |
Audio On Preference |
On Caution (0=No, 1= Yes) |
|
18 |
1 |
Audio On Preference |
On Warning(0=No, 1= Yes) |
|
19 |
1 |
Audio On Preference |
On Alarm(0=No, 1= Yes) |
|
20 |
1 |
Audio On Preference |
On Trouble(0=No, 1= Yes) |
|
21 |
1 |
Audio On Preference |
On Auxilary(0=No, 1= Yes) |
|
22-24 |
1 |
Spare |
|
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25..49 |
2 |
|
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50.-74 |
3 |
|
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75.- 99 |
4 |
|
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100-124 |
5 |
|
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125..149 |
6 |
|
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150.-174 |
7 |
|
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175.- 199 |
8 |
|
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