ProSoft Technology 5201-MNET-101S - Manual (Page 40)

101S Protocol Configuration IEC-101 Slave ♦ ProLinx Communication Gateway
Protocol Manual IEC 60870-5-101 v3 Slave (Firmware version 3.xx)
Page 40 of 159 ProSoft Technology, Inc.
August 6, 2010
Parameter Description Range
C_RC_NA point count The number of point values assigned in command
step-point database.
0 to 1000
C_BO_NA point count The number of 32-bit values assigned in command
bitstring database
0 to 1000
C_SE_NA point count The number of point values assigned in command
normalized-point database.
0 to 1000
C_SE_NB point count The number of point values assigned in command
scaled-point database.
0 to 1000
C_SE_NC point count The number of point values assigned in command
short-float point database.
0 to 50
2.2.4 Sequence Flag
In order to save bandwidth, you can configure the gateway to use the Sequence
Flag feature. If this feature is not selected, the gateway will send the Information
Object Address (IOA) and the data value for every Monitor information object in
a poll response to the Master. If this parameter is enabled, the gateway will turn
on the Sequence Flag bit in a Monitor response; send the Informaiton Object
Address of only the first object in the response, along with its data value; and
send only the data values for all the other information objects in the response.
The Master assumes that all other points use IOAs in a contiguous order (using
the first point as the starting reference address). Since the IOAs are omitted for
all but the first point, this feature allows each message packet to contain more
process data, which improves network throughput and optimizes bandwidth
utilization.