RKC INSTRUMENT Z-TIO-G, Instruction Manual, Page: 191 / 246

9. COMMUNICATION DATA DESCRIPTION
IMS01T28-E4
9-83
SV select function
RKC communication
identifier KM
Modbus
register address ch1: 033AH (826)
ch2: 033BH (827)
Select the slave action in response to the set input from the master when operation is switched from Local
mode to Remote mode.
Attribute:
R/W
Digits:
1 digit
Number of data:
2 (Data of each channel)
Data range:
0: Remote SV function
1: Cascade control function
Factory set value:
0
Related parameters:
RS bias * (P. 9-30), RS ratio * (P. 9-31), RS digital filter * (P. 9-31),
Remote SV function master channel module address * (P. 9-87),
Remote SV function master channel selection * (P. 9-88)
* Common settings of the SV select function (Remote SV, Cascade control)
Function:
Since internal communication has a time lag (250 ms) in data transmission, when using it in a
fast response control system, take this time lag into consideration.
[The salve set value (Remote SV) is updated at each time lag.]
The maximum number of both master and slave Z-TIO modules that can be connected is 16.
The SV select function only operates within connected modules (SRZ unit).
 Remote SV function
The Remote SV function controls the Measured value (PV) of the channel specified as the master as a
remote SV.
Example: When two Z-TIO modules are used to control with a remote SV
Use CH1 at address 0 as the Master and use CH1 and CH2 at address 1 as slave channels. The Measured
value (PV) of the master will be the Set value (SV) of the slaves.
Master channel
address 0 (CH1)
Slave channel
address 1 (CH1)
Slave channel
address 1 (CH2)
(Internal communication)
Z-TIO module
MV
PV
Communication
Controlled object A Controlled object B Controlled object C
Local SV
PID
Remote SV
Communication
PV
Master SV
Local SV
PID
MV
Digital
filter
Ratio
Bias
Remote SV
Communication
PV
Master SV
Local SV
PID
MV
Digital
filter
Ratio
Bias
Remote SV
Block diagram of Remote SV by internal communication