Proline Promass 83E/F/O Operation Manual - FMC Technologies

Proline Promass 83OperationCommand No.HART command / Access typeCommand data(numeric data in decimal form)Response data(numeric data in decimal form)53 Write device variable unitAccess = writeThis command sets the unit of the given device variables.Only those units which suit the device variable aretransferred:– Byte 0: Device variable code– Byte 1: HART unit codeCode of the supported device variables:See data ä 44! Note!• If the written unit is not the correct one for the devicevariable, the device will continue with the last validunit.• If you change the unit of the device variable, this hasno impact on the system units.The current unit of the device variables is displayed inthe device as a response:– Byte 0: Device variable code– Byte 1: HART unit code! Note!Manufacturer-specific units are represented using theHART unit code "240".59 Write number of preambles inresponse messageAccess = writeThis parameter sets the number of preambles which areinserted in the response messages:Byte 0: Number of preambles (2 to 20)As a response, the current number of the preambles isdisplayed in the response message:Byte 0: Number of preamblesIssue/Rev. 0.2 (12/12) MN0M022 • Page 49