M_me_na and m_me_nb, M_me_nc and m_it_na – ProSoft Technology 5205-104S-PDPS User Manual
Page 45
Protocol Implementation
4205/5205-TS-104S-PDPS ♦ ProLinx Standalone
IEC-60870-5-104 to PDPS Communication Module with Time Stamp
ProSoft Technology, Inc.
Page 45 of 128
July 12, 2007
These points would be used as follows:
Inf. Object Address
Module Database Address
300
Low Byte of word 20
301
Low Byte of word 30
302
High Byte of word 40
M_ME_NA and M_ME_NB
The monitored measured normalized and measured scaled points occupy one
word with word-addressing.
For example, if you configured the following points:
# Default
# Point # DB Address Group(s) Deadband IV DB Bit
# ------- ---------- -------- -------- ---------
START
400 10 80000000 0 0
401 12 00000200 0 0
402 18 00000400 0 0
END
These points would be used as follows:
Inf. Object Address
4205/5205-TS-104S-PDPS Module Database Address
400 Word
10
401 Word
12
402 Word
18
The monitored measured normalized points use a data representation defined by
the protocol specification, where each bit represents a value as follows:
Bit 16
15
14
13
12
11
10
9 8 7 6 5 4 3 2 1
Value S 2
–1
2
-2
2
-3
2
-4
2
-5
2
-6
2
-7
2
-8
2
-9
2
–10
2
–11
2
–12
2
–13
2
–14
2
–15
Example: a value of 4000hex is interpreted as 0.5
M_ME_NC and M_IT_NA
The monitored measured short floating point and monitored integrated total
points occupy two words with double-word addressing.
For example, if you configured the following points:
# Point # DB Address Group(s) Deadband IV DB Bit
# ------- ---------- -------- -------- ---------
START
500 20 80000000 0 0
501 32 00000200 0 0
502 52 00000400 0 0
END
These points would be used as follows:
Inf. Object Address
Module Database Address
500
Words 40 and 41