Laurel-electronics LTE SERIES TRANSMITTERS ANALOG INPUT Manuale Utente Scaricare il pdf (Pagina 27)

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4.0 SUPPORTED FUNCTION CODES

FC03: Read Holding Registers

Reads internal registers containing setup parameters (Scale, Offset, Setpoints, etc.)

FC10: Write Multiple Registers (FC10 = 16 dec)

Writes internal registers containing setup parameters (Scale, Offset, Setpoints, etc.)

FC04: Read Input Registers

Reads measurement values and alarm status. Returns values in 2's Complement Binary Hex

format without a decimal point. The displayed system decimal point can be read with FC03 at

address 0057. Use only odd Register Addresses and an even number of Registers.

Address TM Transmitter Response

------- -----------------------------------------------

00 01 Returns Hi word of Alarm status

00 02 Returns Lo word of Alarm status

00 03 Returns Hi word of Measurement value

00 04 Returns Lo word of Measurement value

00 05 Returns Hi word of Peak value

00 06 Returns Lo word of Peak value

00 07 Returns Hi word of Valley value

00 08 Returns Lo word of Valley value

FC05: Write Single Coil

Action command to meter

Output Output

Address Value Action Command

------- -------- ----------------------------------------

00 01 FF 00 Transmitter Reset (No Response)

00 02 FF 00 Function Reset (Peak, Valley)

00 03 FF 00 Latched Alarm Reset

00 04 FF 00 Peak Reset

00 05 FF 00 Valley Reset

00 0C FF 00 Tare Command (Weight Transmitter) (00 00 resets Tare)

FC08: Diagnostics

Checks communications between the Master and Slave, and returns the count in the Modbus

Slave counters (which are reset when the meter is reset).

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Laurel-electronics LTE SERIES TRANSMITTERS ANALOG INPUT Manuale Utente Pagina 27