Chapter 9 - Emergency Objects; Chapter 10 - Operation; Appendix - Honeywell DPS CANopen User's & Technical Manual

Digital Pressure Sensor with CANopen

CHAPTER 9 - EMERGENCY OBJECTS

The Digital Pressure Sensor with CANopen
transmit an emergency object if an internal error is detected or
a source of error is removed. The Model DPS supports the error
codes listed in Table 24.
9.1 Supported Emergency Codes
Table 24. Digital Pressure Sensor with CANopen
Supported Emergency Codes
Emergency Error Register
Error Code
2201 03
3201 05
5000 81
8120 11
8140 11
Table 25. Getting the Pressure Data
ID DLC Data (hex)
(hex)
Byte0 Byte1 Byte2 Byte3
77F 1 00
000 2 01 7F
1FF 4 05 00
, Model DPS, will
®
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Description
Sensor failure
Over flow / under flow
EEPROM error
CAN in error passive mode
Recovered from bus off
Byte4 Byte5
00 00
, Model DPS
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CHAPTER 10 - OPERATION

This section describes the fundamental operation and configu-
rations available for the Digital Pressure Sensor with CANo-
pen , Model DPS. The object dictionary supported is provided
®
in Appendix 1.
10.1 Getting Pressure Data
The Digital Pressure Sensor with CANopen
default sends out 32 bit pressure data (in decimalized inte-
ger format, in psi units), every 100 millisec. Table 25 shows
the sequence of messages necessary to obtain the pressure
reading from the Model DPS. Provide the excitation voltage
to the Digital Pressure Sensor with CANopen
transmits boot-up message to PC on identifier 77F. Host ap-
plication transmits START REMOTE NODE command. When
START REMOTE NODE command is transmitted, by the host,
the Model DPS starts transmitting the PDO containing the 32-bit
pressure data (in decimalized integer format, in psi units) every
100 millisec.
10.2 Interpreting the Pressure Data
The Digital Pressure Sensor with CANopen
provides the pressure reading in 32 bit signed integer values
of Intel format, i.e. LSB first. The actual value of the pressure
reading depends on the number of decimal digits that should
be used with these integer values. The decimal digits used can
be read from the Model DPS using an SDO access to object
6132. In Digital Pressure Sensor with CANopen
the number of decimal digits is 3. So the pressure data can be
interpreted as 00000.005 psi.
Description
Byte6 Byte7
Boot-up message.
Node ID 7F
Send command with
node Id 7F
Digital Pressure Sen-
sor with CANopen
Model DPS, starts
transmitting PDO
containing the pres-
sure data every 100
millisecs
Sensing and Productivity Solutions
50085804, Rev. B
, Model DPS, by
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, Model DPS,
®
, Model DPS,
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, Model DPS,
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Direction w.r.t Digi-
tal Pressure Sensor
with CANopen
®
Transmit
Receive
,
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Transmit
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