FieldServer Driver – Serial
Data Aire DAP
|This Document Rev:||Rev2|
|Interface:||RS485 (RS-232 with converter)|
The Data Aire Driver is capable of direct connection to a network of Data Aire DAP devices
The Fieldserver is connected in a RS485 loop topology. Two Fieldserver ports are required per loop. The driver is an active client. All data is obtained by poll & response.
The driver may be configured very simply, storing all the data obtained from each field device in a large array. A simple one line configuration tells the driver to store ‘everything’. The driver manual identifies the location in the array of each data field. Advanced configuration are also possible.
The driver is capable of polling for and storing all data available from the following devices
|1||None||044 data logger|
|2||Yes||046 expanded DAP|
|3||Yes||046 2 mod chiller|
|4||Yes||046 3 mod chiller|
|5||Yes||048 DAP, 80-character display|
|6||Yes||049 DAP, 16-character display|
|7||Yes||080 DAP II, no relay expansion|
|8||Yes||080 Chiller II|
|9||Yes||080 DAP II, with relay expansion|
|E||Yes||080 DAP II, with analog module|
|F||Yes||080 DAP II, with relay and analog|
The driver requires two dedicated RS232 (with 485 converters) or both RS485 ports for each DAP device network.
Several factors outside Fieldserver’s control make for slow communications with Data Aire devices. The Data Aire communications is based on a very low baud rate. In addition inter-message timing constraints add significant time to each transaction.