Siemens SITRANS P DS III - Warning and Alarm Limits

Operator control functions via PROFIBUS
7.7 Warning and alarm limits
SITRANS P DS III with PROFIBUS PA
Operating Instructions, 06/2013, A5E00053276-07
117
Table 7- 8 Combined blocks
Lock
Write block for parameter
changes over the bus
Release of local operation
over SIMATIC PDM
Display
On
On or off
Released or blocked
L
Off
Off
Blocked
LA
Off
Off
Released
- -
Off
On
Blocked
LL
Off
On
Released
LC
See also
Locking of buttons and functions (Page 81)
7.7
Warning and alarm limits
The analog input function blocks each have high and low warning and alarm limits for the
output. In order to avoid unstable display of warnings and alarms, specify a hysteresis.
In the analog input function blocks, set the following parameters according to process
requirements:
● Limit value hysteresis
● High warning limit
● High alarm limit
● Low warning limit
● Low alarm limit
Status
If limits are violated, the output is accompanied by a status which you can evaluate in your
application program:
Table 7- 9 Limits and status displays
Status
Display
Status
Hex
Violation
G_137
89
Low warning limit
G_138
8A
High warning limit
G_141
8D
Low alarm limit
G_142
8E
High alarm limit