User Manual MCx-xxxAS-1.05
Page 13 of 18
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Rev.2021.8 [email protected]
Using Hanbay Function Codes
Register name
Address
Max Min
Default Actuator
address
Function
code
CRC
N/A
0x0064
N/A N/A N/A
Example:
Re-zero actuator number 1
0x01
0x64
0x----
1 byte
1 byte
2 bytes
Register name
Address
Max Min
Default Actuator
address
Function
code
CRC
N/A
0x0065
N/A N/A N/A
Example:
Close the valve on actuator number 1
0x01
0x65
0x----
1 byte
1 byte
2 bytes
Register name
Address
Max Min
Default Actuator
address
Function
code
CRC
N/A
0x0066
N/A N/A N/A
Example:
Open the valve on actuator number 1
0x01
0x66
0x----
1 byte
1 byte
2 bytes
Calibration
If the actuator is being controlled via 4-20 mA (resp. 1-5 V) input, i.e. the
“
TargetFromRS485Flag
” register
contains value 1, the actuator will re-zero when the input signal is between 2.80 and 4.16 mA (resp. 0.700
and 1.04 V). It will turn clockwise until the actuator has reached the fully closed position of the valve.
If the actuator is being controlled via Modbus protocol, i.e.
“
TargetFromRS485Flag
” register contains value
0, the actuator will re-zero when the value in the
“
TargetPosition
” register is the same as the value in the
“
InputRangeLow
” register.
If the valve is removed for any reason, the calibration routine must be initiated on the actuator
manually after re-mounting the valve.
This is done by toggling DIP 12 (switch position, then back to the
original position) while the actuator is powered. Alternatively, use command code 0x64 (refer also to the
Modbus Protocol section). The valve will close very slowly, finding the seat and preventing any damage.
If you need to re-zero in the opposite direction
(i.e.: for pressure regulators, which typically go to the “top”
fully open position at 4 mA) change the setting of DIP 12 and cycle power.
WARNING:
It is VERY important that you put DIP 12 back to its original setting. Failing to do so
will make the actuator turn in the opposite direction next time you power it up.
