Omron NA Series HMI Connection Guide

DIP switch error for CJ1W-CIF11: When using RS-422A 4-wire system, Pin2=OFF，Pin3=OFF； If using a 2-wire system, Pin2=ON. Terminal resistor Pin1 is only turned on at both ends of the device.

7.2 Variables cannot be read or have incorrect values

Data type mismatch: For example, mapping UINT in the controller to Short in HMI can result in symbol errors. Check the data type correspondence table in the manual.

Address out of bounds: For the CJ series, when accessing the EM area, it is necessary to ensure that the current bank exists (only CJ2 supports multiple banks).

Structure import failed: Do not manually copy structure variables, you must use the 'Import from Controller' function.

Online editing causes interruption of variable access: When using Sysmac Studio for online editing of a controller, the HMI briefly pauses variable access to the controller. If editing variables that do not involve HMI references, and the Runtime version is ≥ 1.13 and the controller firmware is sufficiently new, this process will be omitted and access will not be interrupted.

7.3 Performance degradation

Avoid mapping large arrays or structures: this is particularly evident when connecting through serial ports. Suggest mapping as needed or accessing array elements separately.

Reduce timeout: If the network quality is good, setting the timeout to 1 second can speed up error recovery.

Using switch multicast filtering: In EtherNet/IP networks, unfiltered multicast packets can consume a significant amount of bandwidth.

7.4 Touch screen no response or abnormal display

The backlight brightness setting is too dark: it can be adjusted in the system menu, or the default brightness can be restored through the item properties.

Touch calibration drift: Regularly perform touch calibration to avoid accidental triggering of edge objects.

Glove wearing operation: Capacitive touch screens are not sensitive to thick gloves. It is recommended to use specialized touch gloves or reduce the thickness of gloves.