ProSoft Technology 5201-MNET-101S - Manual (Page 100)

Reference IEC-101 Slave ♦ ProLinx Communication Gateway
Protocol Manual IEC 60870-5-101 v3 Slave (Firmware version 3.xx)
Page 100 of 159 ProSoft Technology, Inc.
August 6, 2010
The events can be returned for Class 1 or Class 2 requests according to the data
type as follows:
Data Type Class Request
M_SP_NA Class 1
M_DP_NA Class 1
M_ST_NA Class 1
M_BO_NA Class 1
M_ME_NA Class 2
M_ME_NB Class 2
M_ME_NC Class 2
M_IT_NA Class 1
Note: In response to a Class 2 poll the gateway may respond with Class 1 data when there is no
Class 2 data available. So eventually the events for M_SP_NA, M_DP_NA and M_ST_NA points
may also be sent during a Class 2 response.
Deadbands
The Monitored Measured points (M_ME_NA and M_ME_NB) will generate
events only if the data value changes an amount greater than or equal to the
configured deadband value.
For example, if the following point is configured:
Then, if the current value for this point is 130, it would generate events only if:

NEW VALUE is less than or equal to 30
OR
 NEW VALUE is greater than or equal to 230.
Each monitored measured point can have its own deadband value assigned to it
in the configuration file or by using the PCB configuration options.