Alarm Detection And Processing 126 11.6.12 Parameter Of The Analogue Input Function Block - Endress+Hauser iTEMP TMT 165 FOUNDATION Fieldbus Betriebsanleitung

FOUNDATION Fieldbus temperature transmitter
2
Index Parameter
23 ACK_OPTION
Endress+Hauser
in the parameter BLOCK_ALM (see page 129).
• Limit values process alarms
If a limit value is infringed then the priority specified for the limit value alarm will be
checked before the limit value violation is communicated to the fieldbus host system.
The priority that specifies the action in the event of an active limit value violation is
determined by the following parameters:
– HI_HI_PRI (see page 131)
– LO_LO_PRI (see page 133)
The status of the limit value process alarms is communicated to the fieldbus host
system via the following parameters:t:
– HI_HI_ALM (see page 130)
– LO_LO_ALM (see page 132)
If the option of a limit value process alarm has not been enabled in the parameter
ACK_OPTION (see page 127) then this must be acknowledged directly in its
parameter (see list).
Note:
The parameter ALARM_SUM (see page 129) shows the current status of all the
process alarms.
11.6.12 Parameter of the Analogue Input Function Block
The following table shows all the available parameters of the Analogue Input
function block.
Analogue Input Function Block
Write access with
operating mode
(MODE_BLK)
AUTO - MAN - OOS
– HI_PRI
– LO_PRI
– HI_ALM
– LO_ALM
This parameter is used to specify whether a process alarm must be
acknowledged at the time of alarm recognition by the fieldbus host system. If
this option is enabled, the process alarm is acknowledged automatically.
Selection:
1 HI_HI_ALM Upper limit value alarm
2 HI_ALM Upper limit value/pre alarm
3 LO_LO_ALM Lower limit value alarm
4 LO_ALM Lower limit value/pre alarm
5 DV_HI_ALM Limit alarm for upper differential control
(SP-PV)
6 DV_LO_ALM Limit alarm for lower differential control
(SP-PV)
7 BLOCK ALM Block alarm
8 to 15 Are not used.
factory default: The option is not enabled for any alarm,
the alarms must be acknowledged
(see page 131)
(see page 133)
(see page 130)
(see page 132)
Description
11 Appendix
127