FieldServer Driver
FS-8700-128
Safetran SCS-128
Description
The Safetran-SCS-128 driver allows the transfer of data to and from devices over RS-232 SCS-128 protocol. Vital Harmon Logic Controller (VHLC) supports SCS-128 protocol. SCS-128 80938-098 Rev A04 is the basis of the Safetran-SCS 128 driver. The FieldServer can be configured as a Client or Server.
| Fieldserver Mode | Nodes | Comments |
| Client | 1 | Only 1 virtual client per port allowed on multidrop systems, which can poll 127 server devices |
| Server | 127 | This is a protocol limit, maximum devices can be polled by Client |
Formal Driver Type
Serial
Client or Server
Compatibility Matrix
| FieldServer Model | Compatible with this driver |
| FS-x2010 | Yes |
| FS-x2011 | Yes |
| FS-x30 | Yes |
| FS-x40 | Yes |
Connection Information
| Connection type | RS-232 |
| Baud Rate* | 300 ,600, 1200, 2400, 9600 (Vendor limitation)
FieldServer does not support baud 75 or 150. |
| Data Bits* | 8 (Vendor limitation) |
| Stop Bits* | 1 (Vendor limitation) |
| Parity* | Even (Vendor limitation) |
| Multidrop Capability | Yes |
Devices tested
| Device | Tested (FACTORY, SITE) |
| Safetran-SCS | Site |
Connection configurations
The FieldServer is connected to the VHLC as shown in connection drawing.
Communications functions – Supported functions at a glance:
Data Types Supported
| FieldServer Data Type | Description (or Device Data Type) |
| Digital Input | Indications |
| Digital Output | Controls |
Read Operations supported
| FieldServer as a Client | FieldServer as a Server |
| Read Binary Status via: | Provide Binary Status for: |
| Poll | Poll |
| Recall | Recall |
| Indication Acknowledge | Accept Indication Acknowledge |
Write (Control) Operations supported
| FieldServer as a Client | FieldServer as a Server |
| Write Binary Commands: | Accept Binary Commands: |
| Control Command | Verify Control Command |
| Execute | Execute Acknowledge and apply |
Special Operations supported
| FieldServer as a Client | FieldServer as a Server |
| Transmit cutoff | Transmit cutoff |
Unsupported Functions and Data Types
| Function | Reason |
| Station testing functions | These are modem testing and calibration functions, not required for FieldServer. |
| Change Baud
Debug Recorders |
These functions are not implemented in the Protocol, however debugging and recording can be achieved using diagnostic tools from FieldServer. |
Unsupported Devices or Protocol Options
| Device | Details |
| Devices operates on baud rate 75 or 150 | FieldServer does not support these baud rates |