Siemens 500 NIM - Manual (Page 76)

NIM Primitives 4-23 SIMATIC TIWAY I Series 500 NIM User Manual
TT = 46 = Analog Alarm Control Flag (2 words)
MSB
ABCDEFGH IJKLMNOP RSTUVWXY Zabcdefg
LSB
A
B
C
D
E
F
G
H
-
-
-
-
-
-
-
-
-
-
PV scale 20% offset
Take square root of PV
Monitor HIGH/LOW alarm
Monitor HIGH-HIGH / LOW-LOW alarm
Monitor deviation alarms
Monitor rate-of-change alarm
Monitor broken transmitter alarm
Local setpoint = 0
Remote setpoint = 1
Unused and set to zero
Special function program number
I - X
Y - g
If a bit is set to 1, the corresponding action is enabled.
If a bit is set to 0, the corresponding action is disabled.
Figure 4-15 Analog Alarm Control Flag Data Element Format