RKC INSTRUMENT Z-TIO-G, Instruction Manual

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9. COMMUNICATION DATA DESCRIPTION
IMS01T28-E4
9-15
Auto/Manual transfer
RKC communication
identifier J1
Modbus
register address ch1: 0065H (101)
ch2: 0066H (102)
Use to transfer the Auto mode or Manual mode.
Auto mode: Automatic control is performed.
Manual mode: The manipulated output value can be manually changed.
Attribute:
R/W
Digits:
1 digit
Number of data:
2 (Data of each channel)
Data range:
0:
Auto mode
1: Manual mode
Factory set value:
0
Related parameters:
Operation mode state monitor (P. 9-5), MV transfer function (P. 9-66)
PV transfer function (P. 9-81)
Function:
The manipulated output value when changed to the Manual mode from the Auto
mode differs depending on the MV transfer function (P. 9-66) setting. The MV
transfer function enables the selection of whether a balanceless and bumpless
transfer is made or a previous manipulated output value is used.

Balanceless-bumpless function
This function is used to prevent overload caused by the Manipulated output value (MV) suddenly changing
when Auto mode is transferred to Manual mode and vice versa.
Manipulated output value (MV)
Auto mode
Auto mode Manual mode
Time
(a) (b) (c)
(a) Transfer from Auto mode to Manual mode.
When the mode is transferred to Manual mode, the manipulated output value used in
Auto mode will be used as the manual output value in Manual mode.
(b) The manipulated output value is changed (Manual mode function).
(c) Transfer from Manual mode to Auto mode.
When the mode is transferred to Auto mode, the controller starts PID control based on
the MV used in Manual mode.
Link Z-TIO module and Z-DIO module to switch Auto/Manual by using Digital input (DI). For
details, refer to following items:
 Address of interacting modules (P. 9-91)
 Selection switch of interacting modules (P. 9-92)
 SRZ Instruction Manual (IMS01T04-E  )
Regardless of whether the mode is Auto mode or Manual mode, the ON/OFF action remains
effective.