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BRONKHORST EL-FLOW Select Series - Alarms

BRONKHORST EL-FLOW Select Series
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Bronkhors
Instruction Manual EL-FLOW® Select 9.17.099F38
Device Type
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char[6]
R
-
90
113/1
0xF108…0xF10A/ 61705…61707
Device type information string; this parameter contains an abbreviation referring to the identification number.
4.5 Alarms
Alarm settings are most easily accessible using FlowPlot or FlowView or a Bronkhorst® readout and control unit.
The built-in alarm functionality can be used to handle different alarm types:
· system errors and warnings
· min/max alarms
· response alarms
· batch alarms
· master/slave alarms
The used alarm type can be set with parameter Alarm Mode. When an alarm is activated, the type can be read out using
parameter Alarm Info. An automatic setpoint change can be set using the parameters Alarm Setpoint Mode and Alarm New
Setpoint. It is also possible to set an alarm delay, to prevent overreaction to small disturbances, using parameter Alarm Delay
Time. The methods by which an alarm can be reset are controlled by Reset Alarm Enable.
Alarm Mode
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
RW
0…3
118
97/3
0x0C23/3108
Available modes:
Value
Description
0
Alarm off
1
Alarm on absolute limits
2
Alarm on limits related to setpoint (response alarm)
3
Alarm at power-up(e.g. after power-down)
(For DeviceNet™ instruments, only modes 0 and 1 are available)
Alarm Info
Type
Access
Range
FlowDDE
FLOW-BUS
Modbus
Unsigned char
R
0…255
28
1/20
0x0034/53
This parameter provides information about the event type(s) that triggered an alarm situation. The value is a bit-wise
summation of the issued alarm types; convert the value to binary to see which types are issued. The following alarm types
can be issued:
Bit
Value
Type
Description
0
1
Error
Error flag raised
1
2
Warning
Warning flag raised
2
4
Minimum alarm
Measure < Alarm minimum limit
3
8
Maximum alarm
Measure > Alarm maximum limit
4
16
Batch counter alarm
Batch counter reached its limit
5
32
· This bit only: Power-up alarm
Alarm possibly caused by a power dip
· If combined with bit 2 or 3:
Response alarm
Difference between Measure and Setpoint too big
6
64
Master/slave alarm
Setpoint out of limits (caused by Slave factor)
7
128
Hardware alarm
Hardware error

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