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5 I/O Refreshing
NX-series Digital I/O Unit User’s Manual (W521)
5-2 I/O Refreshing Methods
5
5-2-10 An Example of Turning ON Outputs at Specific Times After the Sensor Inputs Change
z I/O Map
Because we added an Additional I/O Power Supply Unit, add 1 to the corresponding numbers that
represent the position and variable of the NX-ID3344 and NX-OD2154 in the example for an Ether-
CAT Slave Terminal, as shown below.
When Units are connected to the CPU Unit, the Time Stamp of Synchronous Output uses the follow-
ing data. It is I/O data for the NX Bus Function Module, which is allocated to the CPU Unit for each
NX Unit.
Use the above variable for the sample programming in the example for an EtherCAT Slave Terminal.
z Task Period of the Primary Periodic Task
The minimum value for the task period of the primary periodic task in the NX1P2 CPU Unit is 2ms.
1ms in the EtherCAT Slave Terminal example cannot be set.
Posi-
tion
Port Variable
Unit2 Input Bit 00 Time Stamp N2_Input_Bit_00_Time_Stamp
Unit3 Output Bit 00 Time Stamp N3_Output_Bit_00_Time_Stamp
Unit3 Output Bit 00 N3_Output_Bit_00
Unit3 Output Bit 00 Output Status N3_Output_Bit_00_Output_Status
Posi-
tion
Port Description R/W
Data
type
Variable
Variable
type
NXBus-
Master
N3 Time Stamp
of Synchro-
nous Output
Contains the time stamp for
the timing of synchronous
outputs from the connected
NX Unit with the device
name "N3."
(Unit: ns)
R ULINT NXBus_N3_Time_
Stamp_of_Synchro-
nous_Output
Global
variable
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