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2. Quick start guide
2. Quick start guide
2.1 Quick start introduction
This chapter describes setting the sensor up using a simple CAN-Software without
specialized CANopen support. The sensor may be configured entirely using raw CAN
telegrams. We recommend to use a software with build-in CANopen support.
Please do note this is only a couple of possible configurations, for full details please
refer to the official CANopen specification.
2.2 Connecting and powering the device
First setup the sensor:
Connect the CAN interface to your PC (e.g. PEAK PCAN-USB, Ixxat USB-to-
■
CAN) and to the sensor and start the CAN-Software (e.g. PEAK PCAN-View, Ixxat
canAnalyser3 Mini). Ensure you use the correct bitrate and Node-ID of the pressure
transmitter.
When the MH-4 is powered up it sends a Boot-Up message
■
ID
700h + Node-ID
The sensor is now in PRE-OPERATIONAL mode and ready to be configured by SDO
(if necessary).
2.3 Configuring the device
The sensor is now ready to be configured and started. Choose one of the following
transmission methods:
Acyclic synchronous transmission (transmission type = 0)
■
Triggered when the SYNC message is received and one of the mapped process data
has changed its value after the last transmission.
Cyclic synchronous transmission (transmission type = 1 ... 240) (default = 1)
■
Triggered when a SYNC message is received (type = 1), each second SYNC
message received (type = 2), etc.
Asynchronous event/timer triggered
■
Timer triggered (transmission type = 254)
■
Adjustable in ms (via Object 1800h.5)
Event triggered (transmission type = 254/255)
■
If the measured value falls below or exceeds an adjustable limit.
If the measured value has changed by more than a delta value compared to the
last transferred measured value.
In order to change the transmission type object 1800h.2 must be changed to the
appropriate transmission type using SDO write access (see 2.5).
WIKA special documentation, model MH-4-CAN
DLC
Byte0
1
00h
EN
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