Chapter Seven: Maintenance Flow Zero Adjustment
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in executing.
Service 0xE, Class 0x30, Instance 1, Service Data (attribute) 0x0B
You should get response data of 0x04
3. Send the Zero Adjust Service using S-Analog Sensor Object Instance 1 ( Flow )
The following DeviceNet Command Starts the Pressure zero.
Service 0x4B, Class 0x31, Instance 1, Service Data (Target Value) can be Empty Data or Data Type based
value, i.e. 2 byte for integer or 4 byte real value, if a value is used, it must be a target value equal to zero.
4. The Flow zeroing procedure usually takes several seconds to perform. Recheck your flow to verify zero has
occurred. You can also perform an explicit GET(Service 0x0E) on Class 0x31, Instance 1, Attribute 0x1C,
which is the Autozero Status. This attribute’s service data will equal “1” while zeroing is in progress and
equal “0” when the zeroing has completed. It is most important that the device is at a zero flow, if a high flow
is detected by the MFC, then zeroing will not occur.
Profibus Zeroing Commands
In cyclic data exchange communication, set the AUTOZERO field in the Send Data structure to 1.
In DP-V1 Extension message, set the Auto Zero Value (Index 16) to zero in slot 0x31 in the Analog
Sensor Object .
RS485 Zeroing Commands
The MFC must be in the Calibrate Mode to zero the device. In the calibrate mode, send the command “AZ”
to zero the device. The message structure appears as shown below:
@@@254AZ!;FF
In this example, “254” is the address and “FF” is the Checksum. Substitute the correct address and checksum
applicable to your device.
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