Emerson Fisher D4

Instruction Manual
D103597X012
D4 Valve with easy-Drive Actuator
October 2017
35
A.3.33 40042 Reset Statistics [Read & Write]
Register: 40042, Address 0x0029 (41).
Function code: 0x10 – Write Multiple registers,
0x06 – Write Single register, or
0x03 – Read Holding registers.
Description: This is a register used to reset the non volatile system statistics (such as number of hours run).
Writing a value of 1 to these registers will reset the values that accessed in registers
40013-40022 to 0.
A.3.34 40043 Analog Input Mode [Read & Write]
Register: 40043, Address 0x002A (42).
Function code: 0x10 – Write Multiple registers,
0x06 – Write Single register, or
0x03 – Read Holding registers.
Description: This is a register that holds an enumeration 0-1 that sets the mode of operation for on/off and
proportional control. When in proportional mode (40033 = 1), a value of 0 sets the unit for
using a 1-5V voltage input. 1 sets up the unit for using a 4-20 mA current command input.
The scaling of the different modes is reflected in the scaling of the value reported in register at
40023 –‘Analog I/P value’. When in on/off mode (40033 = 0), a value of 0 sets the unit for using
both digital inputs, optimized for using the L2e level controller. 1 sets up the unit for using a
single digital input. See Operation for further details.
A.4 Example Modbus Protocol Transactions
A.4.1 Write to Position Demand Register (40002/0x0001/1)
Write of a position demand value of 100% to device at address 1 on the Modbus network – 8 characters.
FIELD
SLAVE
ADDRESS
FUNCTION
CODE
REGISTER
ADDRESS HI
REGISTER
ADDRESS LO
REGISTER
DATA HI
REGISTER
DATA LO
CRC LO CRC HI
Index 0 1 2 3 4 5 6 7
Hex (Dec) 0x01 (1) 0x06 (6) 0x00 (0) 0x01 (1) 0x00 (0) 0x64 (100) 0xD9 (217) 0xE1 (225)
Normal response, 8 characters:
FIELD
SLAVE
ADDRESS
FUNCTION
CODE
REGISTER
ADDRESS HI
REGISTER
ADDRESS LO
REGISTER
DATA HI
REGISTER
DATA LO
CRC LO CRC HI
Index 0 1 2 3 4 5 6 7
Hex (Dec) 0x01 (1) 0x06 (6) 0x00 (0) 0x01 (1) 0x00 (0) 0x64 (100) 0xD9 (217) 0xE1 (225)
Write of a position demand value of 101% to device at address 1 on the Modbus network, note that this value (101% is
outside the legal range of values permitted to be written to this address, so an exception frame is generated – 8
characters.
FIELD
SLAVE
ADDRESS
FUNCTION
CODE
REGISTER
ADDRESS HI
REGISTER
ADDRESS LO
REGISTER
DATA HI
REGISTER
DATA LO
CRC LO CRC HI
Index 0 1 2 3 4 5 6 7
Hex (Dec) 0x01 (1) 0x06 (6) 0x00 (0) 0x01 (1) 0x00 (0) 0x65 (101) 0x18 (24) 0x21 (33)