Honeywell DPS CANopen User's & Technical Manual page 15

Digital Pressure Sensor with CANopen
'Table 17. Transmission Types Supported by the Digi-
tal Pressure Sensor with CANopen
Transmission Description
(hex)
Acyclic, synchronous transmission. The Digi-
tal Pressure Sensor with CANopen
DPS, will transmit a PDO message after
0
occurrence of the SYNC, but only if an event
(change in the pressure data) occurred
before the SYNC.
Cyclic, synchronous transmission. The
Digital Pressure Sensor with CANopen
1-F0 Model DPS, will transmit the PDO message
on reception of the nth SYNC message,
where n is 1 to 240.
Asynchronous transmission. The Digital
Pressure Sensor with CANopen
DPS, will transmit the PDO message at the
FE time interval defined by the event time (by
default it transmits pressure data every 100
millisec). The PDO is transmitted without any
relation to the SYNC object.
Asynchronous transmission. The Digital
Pressure Sensor with CANopen
DPS, will transmit the PDO message at the
FF time interval defined by the event time (by
default it transmits pressure data every 100
millisec).The PDO is transmitted without any
relation to the SYNC object.
Table 19. Command to Change Physical Units from psi to Bar
ID(hex) DLC Data(Hex)
Byte0 Byte1 Byte2 Byte3
67F 8 40 31
5FF 8 60 31
67F 8 40 30
5FF 8 60 30
67F 8 22 31
5FF 8 60 31
67F 8 40 31
5FF 8 60 31
67F 8 40 30
5FF 8 60 30
, Model DPS
®
, Model
®
,
®
, Model
®
, Model
®
Byte4 Byte5
61 01 00 00
61 01 00 00
61 01 00 00
61 01 50 C3
61 01 00 00
61 01 00 00
61 01 00 00
61 01 00 00
61 01 00 00
61 01 78 0D
, Model DPS
®
7.2 Changing the Output Units
The default unit of the process value is psi. The physical units
of the process value can be read or modified by using the ob-
ject 6131. When the units are changed using the object 6131,
the units of all the objects associated with process value is
changed internally by the Digital Pressure Sensor with CANo-
pen , Model DPS. Table 18 contains the list of the objects that
®
are associated with process value. The Model DPS supports
only 1 PDO.
Table 18. List of Objects Affected by Unit Change
Object Description
6148 AI span start
6149 AI span end
6124 AI input offset
6130 AI input process value REAL32
2006 Span
Description
Byte6 Byte7
Read the current
00 00
unit
AB 00 Current unit is psi
00 00 Read process value
00 00 50 psi
Change the unit to
4E 00
bar
00 00 Return ok
Read the current
00 00
unit
4E 00 Current unit is bar
00 00 Read process value
00 00 3.448 bar
Sensing and Productivity Solutions
50085804, Rev. B
Direction w.r.t Digi-
tal Pressure Sensor
with CANopen
®
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