6
5.3 Changing Parameter Settings
Procedures to change parameter settings are shown below.
Change the set value (SV)
Change the set value (SV) from 0 C to 200 C
1. Select the SV setting mode
Press the SET key at PV/SV monitor screen until SV setting screen is displayed.
SV
PV
SV
PV
2. Shift the high-lighted digit
Press the shift key to high-light the hundreds digit.
The high-lighted digit indicates which digit can be set.
SV
PV
SV
PV
3. Change the set value
Press the UP key to change the number to 2.
SV
PV
SV
PV
4. Store the set value
Press the SET key to store the new set value. The display returns to the
PV/SV monitor screen.
SV
PV
SV
PV
Change parameters other than the set value (SV)
The changing procedures are the same as those of example 2 to 4 in the
above "
Change the set value (SV)". Pressing the SET key after the setting
end shifts to the next parameter. When no parameter setting is required, return
the instrument to the PV/SV display mode.
6. OPERATION
6.1 Operating Precautions
(1) All mounting and wiring must be completed before the power is turned on.
(2) The settings for the SV and all parameters should be appropriate for the
controlled object.
(3) A power supply switch is not furnished with this instrument. It is ready to
operate as soon as the power is turned on.
6.2 Set Data Lock (LCK) Function
The set data lock restricts parameter setting changes by key operation. This
function prevents the operator from making errors during operation.
Set value
Parameters which can be changed
0100
All parameters [Factory set value]
0101
No parameters [All Locked]
0110
SV
Parameters protected by Set Data Lock function are still displayed for
monitoring.
6.3 Autotuning (AT) Function
Autotuning (AT) automatically measures, calculates and sets the optimum PID
and LBA constants. The following conditions are necessary to carry out
autotuning and the conditions which will cause the autotuning to stop.
Caution for using the Autotuning (AT)
When a temperature change (UP and/or Down) is 1 C or less per
minute during Autotuning, Autotuning may be cancelled before
calculating PID values. In that case, adjust the PID values manually. It
is possible to happen when the set value is around the ambient
temperature or is close to the maximum temperature achieved by the
load.
Requirements for AT start
Start the autotuning when all following conditions are satisfied:
Prior to starting the AT function, end all the parameter settings other than PID and LBA.
Confirm the LCK function has not been engaged.
When the autotuning is finished, the controller will automatically returns to
PID control.
Requirements for AT cancellation
The autotuning is canceled if any of the following conditions exist.
When the set value (SV) is changed.
When the PV bias value is changed.
When the PV becomes abnormal due to burnout.
When the power is turned off.
When power failure longer than 20 ms occurs.
If the AT is canceled, the controller immediately changes to PID control. The
PID values will be the same as before AT was activated.
When AT is completed, the controller immediately changes to PID control. If
the control system does not allow the AT cycling process, set each PID
constant manually to meet the needs of the application.
7. INITIAL SETTING
7.1
Go to Initialization Mode
1.
Turn on the power to this controller. The instrument goes to the PV/SV
display after confirming input type symbol and input range.
2.
Press and hold the SET key for 5 seconds to go to the Parameter setting
mode from the PV/SV display.
3.
Press the SET key until “LCK” (Set Data Lock display) will be displayed.
4.
The high-lighted digit indicates which digit can be set. Press shift key to
high-light the hundreds digit. (The section in each image of the
controller shows the digits which are not high-lighted.)
SV
PV
5.
Press the DOWN key to change 1 to 0.
SV
PV
6.
Press the SET key to store the new set value. The display goes to the
next parameter, and the Initialization mode is unlocked.
SV
PV
7.
Press the shift key for 5 seconds while pressing the SET key to go to the
Initialization mode. When the controller goes to the Initialization mode,
“SL1” will be displayed.
SV
PV
SV
PV
If the control is set to the initial set mode, all outputs are turned OFF.
7.2
Exit Initialization Mode
When any parameter setting is changed in the Initialization mode,
check all parameter set values in SV setting mode and Parameter
setting mode.
1.
Press the shift key for 5 seconds while pressing the SET key from any
display in the Initialization mode. The controller goes back to the operation
mode and the PV/SV display will be displayed.
2.
Press and hold the SET key for 5 seconds in the PV/SV display.
3.
Press the SET key until “LCK” (Set Data Lock display) will be displayed.
4.
The high-lighted digit indicates which digit can be set. Press shift key to
high-light the hundreds digit.
SV
PV
5.
Press the SET key to store the new set value. The display goes to the
next parameter, and the Initialization mode is locked.
To store a new value for the parameter, always press the SET key.
The display changes to the next parameter and the new value will be stored.
A new value will not be stored without pressing SET key after the new
value is displayed on the display.
After a new value has been displayed by using the UP and DOWN keys,
the SET key must be pressed within 1 minute, or the new value is not
stored and the display will return to the PV/SV monitor screen.
PV/SV monitor display
(PV/SV display mode)
SV setting display
(SV setting mode)
PV/SV monitor display
(PV/SV display mode)
ド
Parameters in the Initialization mode should be set according to the
application before setting any parameter related to operation. Once
the Parameters in the Initialization mode are set correctly, no further
changes need to be made to parameters for the same application
under normal conditions. If they are changed unnecessarily, it may
result in malfunction or failure of the instrument. RKC will not bear
any responsibility for malfunction or failure as a result of improper
changes in the Initialization mode.
Set data lock function display
Set value
0: Initialization mode unlocked
1: Initialization mode locked
CT1 input value display
The parameter displayed varies
on the instrument specification.
Initialize code
selection display
of initialization
mode
CT1 input value
display
CAUTIONS
All mounting and wiring must be completed before the power is turned
on. If the input signal wiring is disconnected or short-circuited (RTD
input only), the instrument determines that burnout has occurred.
Displays:
Upscale:
Thermocouple input, RTD input (when input break)
Downscale: Thermocouple input (specify when ordering),
RTD input (when short-circuited),
Voltage input (1 to 5 V DC), Current input (4 to 20 mA DC)
For the voltage (0 to 5 V DC) or current (0 to 20 mA DC) input, the
display becomes indefinite (display of about zero value).
Outputs:
Control output: OFF (Heat/Cool control: the control output on
both heat-side and cool-side is turned off)
Alarm output: Both of the Alarm 1 and Alarm 2 outputs of this
instrument are turned on when burnout occurs
regardless of any of the following actions taken. (High
alarm, low alarm, etc.) In addition, when used for any
purposes other than these alarms (event, etc.), specify
the Z-124 specification (not to be forcibly turned on).
A power failure of 20 ms or less will not affect the control action.
When a power failure of more than 20 ms occurs, the instrument
assumes that the power has been turned off. When power returns,
the controller will retain the conditions that existed prior to shut down.
The alarm hold action is activated when not only the power is
turned on, but also the SV is changed.
Set data lock function display
CT1 input value display
The parameter displayed varies on
the instrument specification.
SV
PV
WARNING
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