FS8700-71 - TAC I/Net 2000
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FieldServer Driver - Serial
FS8700-71
TAC I/Net 2000
Description
The TAC-I/Net driver allows the FieldServer to transfer data to and from Server and Client devices on a MR LAN over RS-485 using TAC-I/Net driver protocol.
The protocol works over a multidrop RS-485 line and allows only one Client and up to 32 Servers on a network channel. Servers are assigned station addresses that range from 0 to 31. The Client does not have a station address.
If more than 320 points are needed on the I/net network an alternative is for the customer to purchase the 7797-15 Modbus RTU interface card. This interface card will allow 2000 points to be passed to the I/net Sublan. This will change the application from I/net to Modbus, but it will work.
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Fieldserver Mode |
Nodes |
Comments |
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Client |
1 |
Only 1 client node allowed on multidrop systems |
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Server |
32 |
This is the limit per i/net panel. The 32 nodes correspond to the maximum of 32 mr’s that an i/net panel supports. |
Formal Driver Type
Serial
Client or Server
Compatibility Matrix
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FieldServer Model |
Compatible with this driver |
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FS-x2010 |
Yes |
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FS-x2011 |
Yes |
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FS-x40 |
Yes |
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FS-x30 |
Yes |
Connection Information
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Connection type: |
RS-485 (Two wire, Half-Duplex |
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Baud Rates: |
9600 –Vendor Limitation. FieldServer supports all standard baud rates. |
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Data Bits: |
8 |
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Stop Bits: |
1 |
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Parity: |
None |
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Multidrop Capability |
Yes |
Proprietary Physical Interfaces Supported
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Fieldserver Model |
Adapter Model # |
Vendor |
Physical Medium |
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Devices tested
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Device |
Tested (FACTORY, SITE) |
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TAC I/Net 7793 |
SITE |
Connection configurations
Connection to an I/Net device can be depicted as follows:
Connection Notes
The TAC-I/Net Client driver supplied with the FieldServer is currently only used for emulating TAC-I/Net hardware such as the 7793 MCI and should not be used under normal circumstances. Please refer to the section on how to configure the FieldServer as a TAC-I/Net Server if you intend to connect the FieldServer to TAC-I/Net hardware as shown in the connection diagram above. TAC-I/Net hardware such as the 7793 MCI are Client devices to the FieldServer since they initiate polls with commands to the FieldServer which acts as a Server.
It is recommended that the FieldServer have a dedicated i/net port and a dedicated 7793 controller to avoid compatibility problems with other devices on the network.
Communications functions - Supported functions at a glance:
Data Types Supported
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FieldServer Data Type |
Description (or Device Data Type) |
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analog_input |
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analog_output |
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discrete_indicate |
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discrete_output |
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discrete_monitor |
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discrete_control |
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Read Operations supported
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FieldServer as a Client |
FieldServer as a Server |
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Read all points |
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Quick poll all points |
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Write (Control) Operations supported
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FieldServer as a Client |
FieldServer as a Server |
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Control input points |
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Control output points |
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