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7 System-defined Variables That Are Related to the Built-in EtherCAT Port
NJ/NX-series CPU Unit Built-in EtherCAT Port User’s Manual (W505)
7-1 System-defined Variables That Are Related to the Built-in EtherCAT Port
7
7-1-3 EtherCAT Master Function Module, Category Name: _EC
* For NX102 and NX1P2 CPU Units and NJ-series CPU Units, the data type is Array [1..192] OF BOOL.
Note The values of all system-defined variables that are related to errors in EtherCAT communications do not change until the
cause of the error is removed and then the error in the Controller is reset with the troubleshooting functions of the Sys-
mac Studio or the ResetECError instruction.
Functional Classification: EtherCAT Communications Status
* For NX102 and NX1P2 CPU Units and NJ-series CPU Units, the data type is Array [1..192] OF BOOL.
* For NX102 and NX1P2 CPU Units and NJ-series CPU Units, the data type is Array [1..192] OF BOOL.
Variable name _EC_CommErrTbl
Meaning Communications Error Slave Table Global/local Global
Function Slaves are given in the table in the order of slave node addresses.
The corresponding slave element is TRUE if the master detected an error for the slave.
Data type
Array [1..512] OF BOOL
*
Range of values TRUE or FALSE
R/W access R Retained Not retained. Network Publish Published.
Usage in user program Possible. Related instruc-
tions
Reset EtherCAT Error
• ResetECError
Variable name _EC_CycleExceeded
Meaning EtherCAT Communications Cycle Exceeded Global/local Global
Function TRUE if the CPU unit cannot establish communications within the set communications period at startup.
Note You can use this system-defined variable only for NX-series CPU Units.
Data types BOOL Range of values TRUE or FALSE
R/W access R Retained Not retained. Network Publish Published.
Usage in user program Possible. Related instruc-
tions
---
Variable name _EC_RegSlavTbl
Meaning Registered Slave Table Global/local Global
Function This table indicates the slaves that are registered in the network configuration information.
Slaves are given in the table in the order of slave node addresses.
The element for a slave is TRUE if the corresponding slave is registered.
Data type
Array [1..512] OF BOOL
*
Range of values TRUE or FALSE
R/W access R Retained Not retained. Network Publish Published.
Usage in user program Possible. Related instruc-
tions
---
Variable name _EC_EntrySlavTbl
Meaning Network Connected Slave Table Global/local Global
Function This table indicates which slaves are connected to the network.
Slaves are given in the table in the order of slave node addresses.
The element for a slave is TRUE if the corresponding slave has entered the network.
Data type
Array [1..512] OF BOOL
*
Range of values TRUE or FALSE
R/W access R Retained Not retained. Network Publish Published.
Usage in user program Possible. Related instruc-
tions
---
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