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4 Exchanging Data with CPU
Name of device variable
for CJ-series Unit
*_Ch1_CtUdf
*_Ch2_CtUdf
*_Ch3_CtUdf
*_Ch4_CtUdf
*_Ch1_CtRun
*_Ch2_CtRun
*_Ch3_CtRun
*_Ch4_CtRun
*_Ch1_CntDir
*_Ch2_CntDir
*_Ch3_CntDir
*_Ch4_CntDir
*_Ch1_PrstSta
*_Ch2_PrstSta
*_Ch3_PrstSta
*_Ch4_PrstSta
*_Ch1_RstSta
*_Ch2_RstSta
*_Ch3_RstSta
*_Ch4_RstSta
*_Ch1_ZSig
*_Ch2_ZSig
*_Ch3_ZSig
*_Ch4_ZSig
*1 The Reset, Preset, and Z-signal Activated turn ON for at least one CPU Unit task period after the occurrence of
a pulse that was detected since the previous I/O refresh.
*2 During initialization, the Unit turns ON for approximately 120 ms.
4-2-4
Details of Device Variables for CJ-series Unit (for setting)
Setting data can be set with the following two methods.
• Set from Edit Special Unit Settings of Sysmac Studio.
• Set the values for device variables for CJ-series Units.
Unit settings are reflected only when the Controller is reset, or when the Unit restarts. The data setup
file is retained in the CPU Unit by the battery even during power interruptions.
Precautions for Safe Use
When the program is transferred, data set in Special Unit Setup Editing of Sysmac Studio will be
reflected in the device variable for CJ-series Unit in the initial settings data. At the time of trans-
fer, Sysmac Studio checks whether or not the unit must be restarted. Restart the unit after con-
firming the safety of the connected destination.
4-16
Type
R/W
Name
BOOL
R
Counter Underflow
BOOL
R
Counter Run-
ning/Gate Open
BOOL
R
Counting Direction
BOOL
R
Preset Activated
BOOL
R
Reset Activated
BOOL
R
Z-signal Activated
CJ-series 4-Channel Counter Unit Operation Manual for NJ-series CPU Unit (W512)
1: The lower count limit of the Linear Counter is
reached.
1: During Counter operation/while gate open
0: While Counter stopped/while gate closed
1: Count up
0: Count down
*1
1: The presets are executed.
*1
1: A reset is executed.
*1
1: A Z signal is input.
Function
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