Siemens 500 NIM - Manual (Page 71)

NIM Primitives 4-18 SIMATIC TIWAY I Series 500 NIM User Manual
Data Element Types and Formats (continued)
TT = B, C = B: Discrete force, 1 byte C: CR force, 1 byte
1 2 3 4 5 6 7 8 MSB LSB
Y 0 0 0 0 0 0 X
X value Bit definition
0 Off
On 1
Y value Force state
0 Unforced
Forced 1
Figure 4-7 Forced Discrete and CR Data Element Format
TT = 17 = Secondary System Status (2 words)*
Word #1:
Each bit set to 1 indicates that the corresponding bit
in word 2 is a reported status.
Word #2:
Status bits
A = 0 NIM in REMOTE mode
= 1 NIM in LOCAL mode
B = 0 P/C System in REMOTE mode
= 1 P/C System in LOCAL mode
C - P undefined (default to 0)
*This is a readĆonly data type
ABCD
MSB LSB
EFGH IJKL MNOP
ABCDEFGH IJKL MNOP
Figure 4-8 Secondary System Status Data Element Format