Instruction Manual

Instruction Manual
D103460X012
D3 Valve with easy-Drive Actuator
November 2013
34
A.3.28 40037 Low travel Cutoff [Read & Write]
Register: 40037, Address 0x0024 (36).
Function code: 0x10 — Write Multiple registers,
0x06 — Write Single register, or
0x03 — Read Holding registers.
Description: This is a register that holds an integer value of percentage used as a clamp — any position
demand less than this value will be clamped to zero before being passed to the position control
system.
A.3.29 40038 Communications Timeout [Read & Write]
Register: 40038, Address 0x0025 (37).
Function code: 0x10 — Write Multiple registers,
0x06 — Write Single register, or
0x03 — Read Holding registers.
Description: This is a register that holds a value 0-65535 that is the number of seconds for a timeout before
the modbus serial communications channel is determined to be uncommunicative
(0 - ~18Hrs). A valid addressed message must be received by the system within this time limit
if the active control source is Modbus RTU communications. If the time without
communications is exceeded the system will fault and the valve commanded to the default
loss of communications position. A value of 0 can be used to disable this feature. If
communications is resumed then the flag will be cleared and the valve will take the refreshed
position as a demand. The use of this register is shown in table 5 - Fault Register.
A.3.30 40039 Communications Address [Read & Write]
Register: 40039, Address 0x0026 (38).
Function code: 0x10 — Write Multiple registers,
0x06 — Write Single register, or
0x03 — Read Holding registers.
Description: This is a register that holds a value 1-247 that is the Modbus address used by the system on
power up. Values outside the range 1-247 will return an exception code
A.3.31 40040 Communications Baudrate [Read & Write]
Register: 40040, Address 0x0027 (39).
Function code: 0x10 — Write Multiple registers,
0x06 — Write Single register, or
0x03 — Read Holding registers.
Description: This is a register that holds a value 4-6 that is an enumeration of the baudrate used by the
system on power up.
A.3.32 40041 Parity [Read & Write]
Register: 40041, Address 0x0028 (40).
Function code: 0x10 — Write Multiple registers,
0x06 — Write Single register, or
0x03 — Read Holding registers.
Description: This is a register that holds an enumeration of the parity type used by the Modbus serial
interface — either 0 for Odd, or 1 for Even in version 4.13 firmware (version 4.21 firmware
defines 0=Odd, 1=Even, 2=None). Writes outside of the legal range will be rejected with
an exception code.