Prosoft-technology 5201-MNET-101S Instrukcja Użytkownika Pobierz pdf (Strona 101)

IEC-101 Slave ♦ ProLinx Communication Gateway Reference

IEC 60870-5-101 v3 Slave (Firmware version 3.xx) Protocol Manual

ProSoft Technology, Inc. Page 101 of 159

August 6, 2010

A network Master may also dynamically change the deadband for each

monitored point. The Master may send one of the following commands:

Type Command

110 Parameter of Measured Normalized Data (M_ME_NA)

111 Parameter of Measured Scaled Data (M_ME_NB)

112 Parameter of Measured Short Floating Point (M_ME_NC)

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

The gateway calculates the Low Limit and High Limit values using the formula

below (so these values cannot be changed dynamically)

Low Limit = (LAST REPORTED VALUE) - Deadband

High Limit = (LAST REPORTED VALUE) + Deadband

These commands must be sent to a specific Information Object Address. The

gateway associates each monitor measured point with a parameter point through

the following configuration parameters:

1 2 ... 96 97 98 99 100 101 102 103 104 105 106 ... 158 159

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Prosoft-technology 5201-MNET-101S Instrukcja Użytkownika Strona 101