User manual

Reference PTQ-104S Rev2 ♦ Quantum Platform
User Manual IEC 60870-5-104 Server for Quantum
Page 158 of 195 ProSoft Technology, Inc.
February 22, 2013
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 PTQ-104S 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
PTQ-104S gateway associates each Monitor Measured point with a Parameter
point using Parameter Offset entries: