Prosoft-technology 5201-DFNT-104S Manual do Utilizador Página 77

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IEC-60870-5-104 (104S) Protocol Implementation 104S v2 ProLinx Gateway
Protocol Manual (Firmware v2.xx)
ProSoft Technology, Inc. Page 77 of 157
The protocol specification explains that the qualifier value for these commands
should be configured as:
Bits Value Description
1 to 6
0 Not Used
1 Threshold Value (Deadband)
2 Smoothing Factor (filter time constant) - Not Supported
3 Low Limit Transmission of Measured Value
4 High Limit Transmission of Measured Value
5..31 Reserved
7 0 No Change
1 Change
8 0 Operation
1 Not in Operation
For the 104S v2 gateway, the Low Limit and High Limit parameters cannot be
changed by command, because these values are calculated as follows:
Low Limit = (LAST REPORTED VALUE) - Deadband
High Limit = (LAST REPORTED VALUE) + Deadband
These commands must be sent to a specific Information Object Address. The
104S v2 gateway associates each Monitor Measured point with a Parameter
point using Parameter Offset entries:
March 19, 2010
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