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MELSEC-Q
6 PROGRAMMING
(a) Devices used by user
Device Function Description
X0 Setting value write command Sets the parameter to execute normal control and program control using
CH 1 and writes into FeRAM.
PID constant read command from FeRAM
(when GX Configurator-TC is used)
Reads PID constant set by auto tuning from FeRAM.
X1
Auto tuning execution command
(when GX Configurator-TC is not used)
Executes auto tuning for the specified set value.
Operates only in the normal control mode.
X2 Error code reset command Clears(0) error codes.
X3 Setting mode switch command Switches into the setting mode by setting from OFF to ON.
X4 Normal control mode switching command Switches into the normal control mode by setting from OFF to ON.
Needs to set parameters for normal control before switching.
X5 Program control mode switching command Switches into the program control mode by setting from OFF to ON.
Needs to set parameters for program control before switching.
X7 Manual control mode 2 switching command Switches into the manual control mode 2 by setting from OFF to ON.
After the switching, the operation is performed by the values of manual
output settings (X20 to X2F).
X8 Cascade control switching command Switches into the cascade control mode by setting from OFF to ON.
Needs to set parameters for cascade control before switching.
X11 Program control auto tuning execution command Executes auto tuning for program control.*1
X12 Program control pattern data setting command Sets the pattern data for executing program control.*2
X15 Cascade control setting command Sets parameters for executing cascade control.*3
X20 to X2F Manual output setting Specifies the manipulation value when manual control mode 2 is
operated.
Y40 to Y4F Error code output Outputs error codes as BCD value.
Y50 to Y5F Measured value output Outputs measured value as BCD value.
FeRAM read failure output
(when GX Configurator-TC is used)
Outputs when reading from FeRAM has failed.
Y60
FeRAM write failure output
(when GX Configurator-TC is not used)
Outputs when writing into FeRAM has failed.
D50 Error code Stores error codes that are read out when the error has occurred.
D51 Measured value Stores measured values that are read out.
When turning ON the setting value write command X0, the parameters,
which are set in this program example, are as follows.
• CH2 Unused Channel Setting : 1(Unused. However, set "used"
when used for cascade control. In
this case, parameter is set to the
same as CH1.)
• CH1 Input Range : 0 (K: -200 to 1372
)
• CH1 Alert 1 Mode Setting : 1 (UprLmt Input Alert)
• CH1 Alert Set Value 1 : 1800 (180
)
• CH1 Set Value Setting : 800 (80
)
• CH1 Upper Setting Limiter : 2000 (200
)
• CH1 Lower Setting Limiter : 0 (0
)
When program control is used, first turn on X12 (program control pattern
data setting command), and then turn on X0.
*1: PID constants of zone1 and zone2 that are used for program control are set.
By turning on X11, the auto tuning is executed after switching into normal control mode.
Then, PID constant of zone is set when the auto tuning ends.
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