Omron NX Series Hardware User Manual page 66

1 Introduction to NX-series Controllers
Maximum process data size
Maximum process data size per slave
Communications cycle
Sync jitter
Unit con-
figuration
Units on CPU
Rack
Maximum number of NX Units for entire controller
Power supply
Internal
clock
Accuracy
Retention time of built-in capacitor
*1. Execution objects and variable tables (including variable names)
*2. Memory for CJ-series Units is included.
*3. The value can be set in 1-word increments. The value is included in the total size of variables without a Retain attribute.
*4. The value can be set in 1-word increments. The value is included in the total size of variables with a Retain attribute.
*5. For terminology, refer to the NJ/NX-series CPU Unit Motion Control User's Manual (Cat. No. W507).
*6. Data will be refreshed at the set interval, regardless of the number of nodes.
*7. "pps" means packets per second, i.e., the number of communications packets that can be sent or received in one second.
*8. The allowable bandwidth varies depending on the RPI of the connection in use, the primary task period, and the number of ports si-
multaneously used for EtherNet/IP communications.
*9. As the EtherNet/IP port implements the IGMP client, unnecessary multi-cast packets can be filtered by using an Ethernet switch that
supports IGMP Snooping.
*10. For details on the database connection service, refer to the NJ/NX-series Database Connection CPU Units User's Manual (Cat. No.
W527).
*11. For details on the OPC UA server, refer to the NJ/NX-series CPU Unit OPC UA User's Manual (Cat. No. W588).
*12. If set to 0 (zero), it is assumed to be 50 ms.
*13. The number of value attributes is defined by the following formula.
Number of value attributes = (Number of basic data type variables) + (Number of array-specified elements) + (Number of values in the
structure)
*14. A ring topology can be used with project unit version 1.40 or later.
*15. You can check the I/O allocation status with the Sysmac Studio. Refer to the NJ/NX-series CPU Unit Software User's Manual (Cat. No.
W501) for how to check the I/O allocation status. Also, refer to the relevant manuals for specific Units for the maximum I/O data size
per NX Unit.
1-14
Item
Maximum number of X Bus Units that
can be mounted to the CPU Unit
Maximum number of NX Units that can
be mounted to the CPU Unit
Maximum I/O data size that can be allo-
cated in the CPU Unit
Model
Power OFF detection time
NX502-
15££ 14££
Input: 11,472 bytes
Output: 11,472 bytes
Input: 1,434 bytes
Output: 1,434 bytes
Primary periodic task
250 μs to 8 ms (in 250-μs increments)
1 μs max.
4
63
*15
Inputs: 8,192 bytes
*15
Outputs: 8,192 bytes
4096
A non-isolated power supply for DC input is built into
the CPU Unit.
2 to 4 ms
At ambient temperature of 55°C: -4.0 to 4.0 min error
per month
At ambient temperature of 25°C: -2.5 to 2.5 min error
per month
At ambient temperature of 0°C: -4.0 to 4.0 min error
per month
At ambient temperature of 40°C: 10 days
NX-series NX502 CPU Unit Hardware User's Manual (W629)
13££