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4. If Output3 is configured as a regulator, the SI unit for Scale must be the same as for
Flow.
P-NET SWNo 0: SerialNo
This register contains a production serial number, which is set by PROCES-DATA and
cannot be changed. This serial number is printed on the electronic module.
The serial number is used for service purposes and as a 'key' to set the P-NET node ad-
dress for the Flow Transmitter. When setting the P-NET node address, the least significant
byte in the serial number holds the P-NET node address and the serial number is contained
in the 3 most significant bytes (6 digits).
Setting the P-NET node address using the serial number to identify a particular device, is
achieved by writing the compound number into the serial number register (possibly using a
broadcast address = $7E (hex)).
The last data byte must hold the chosen P-NET node address for the Flow Transmitter with
that serial number. The first 3 bytes must contain the same serial number as that already
held in the 3 most significant bytes of the SerialNo register. If a device detects that the two
serial number bytes are not identical, the P-NET node address will not be changed from
that already set.
Obtaining a readout of the P-NET node address using the serial number is performed by
reading the serial number and then masking to reveal only the least significant byte (possi-
bly using the broadcast address = $7F (hex)).
Note:
When reading the P-NET number / serial number using the broadcast node ad-
dress = $7F, all modules connected to this P-NET segment will answer. There-
fore, only the module needing the address change should be connected to P-NET.
When setting the P-NET node address via the serial number with the broadcast
node address = $7E, all modules on the P-NET will receive the message, but
none will give a reply (as would be the case in a normal transmission). Therefore,
a transmission error will be generated.
P-NET SWNo. 1: DeviceType
This register holds information about the type of device, and may only be read out via
P-NET. The device type for the Flow Transmitter is 340 .
P-NET SWNo. 2: PrgVers
This register holds information about the program version, and may only be read out via
P-NET.
P-NET SWNo. 3: Error3
The flow transmitter is equipped with a comprehensive test system, which is able to dis-
close faults, arising from improper use of the transmitter, or faults arising from the transmit-
Manual
Flow Transmitter, PD 340
502 010 05
PD 210 display: not accessible
PD 210 display: not accessible
PD 210 display: not accessible
PD 210 display key: TEST
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