Bronkhorst DeviceNet slave interface - Manual (Page 25)

BRONKHORST ®
Page 25 DeviceNet interface 9.17.026
4.3 A
NALOG SENSOR OBJECT
4.3.1 Sensor value
See Setpoint attribute of Single stage controller above.
4.3.2 Alarm enable
Attribute Alarm enable of Analog Sensor object is linked to propar 97;3 (Alarmmode).
FLOW‐BUS Devicenet
Alarmmode Alarm enable
proc 97; par 3 obj 0x31, attr 8
ALRM_OFF
(ALRM_RESPONSE)
(ALRM_POWERFAILURE)
0 (off)
ALRM_MINMAX 1 (on)
When 0 is written to Alarm enable attribute, the internal alarm mode is always set to ALRM_OFF. The modes
ALRM_RESPONSE and ALRM_POWERFAILURE can be set by RS232, not by DeviceNet.
More information can be found in the manual “917023 Operational instructions digital instruments”
This document can be found at:
http://www.bronkhorst.com/en/downloads/instruction_manuals/
4.3.3 Alarm Trip Points
Alarm_Trip_Point_Low attribute is linked to propar 97/2 (Min. limit). Valid range is [0, 32000].
Alarm_Trip_Point_High attribute is linked to propar 97/1 (Max. limit). Valid range is [0, 32000].
A value outside the valid range is rounded to the nearest value within the range. Note that the Trip Point values are
dependent on the selected data types/units.
For the maximum value the following mapping is used:
FLOW‐BUS DeviceNet
Max limit Alarm Trip Point High
proc 97; par 1 obj 0x31, attr 17
0 (off) 32000
1 0
32000 31999
4.3.4 Gas calibration object instance
Indicates which Gas Calibration object instance is active for this object. The value of this attribute is equal to
(fluidnumer+1). Value 0 (disabled) is not supported.
4.4 A NALOG ACTUATOR OBJECT INSTANCE
4.4.1 Actuator value
The followings data units are supported:
0x1001 (counts):
0 = valve closed, 32767 = valve fully open
0x1007 (percent): 0 = valve closed, 100 = valve fully open
The following data types are supported:
0xC3 (int) 0xCA (real)