CJ1W-NC214 Omron, CJ1W-NC214 Datasheet - Page 412

• Manufacturer Part Number: CJ1W-NC214
• Description: High Speed Pulse Train 2 Axes
• Manufacturer: Omron

Specifications of CJ1W-NC214

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

8
8-5 Data Read with IORD Instruction
8-39
Ladder Program Example
You can use the IORD instruction in the interrupt task. Accordingly, you can execute the high-
speed response processing of special I/O by interrupting.
However, in such a case, always set to the prohibit cyclic refresh with the Special I/O Unit
(1: Do not perform a cyclic refresh) in the Special I/O Unit cyclic refresh setting under the PLC
Setup.
If you execute one of 2 below in an interrupt task when you set to the perform a cyclic refresh
with the Special I/O Unit (0: Perform a cyclic refresh), it results in multiple refreshing and a non-
fatal error occurs, then the interrupt task error flag (A402.13) turns ON.
You cannot read any data when the PCU is busy. Therefore, use = flag to configure a self-holding
Self-hold at contact A when the input conditions are satisfied. The IORD instruction is executed in
If you place the Condition Flags after a different instruction, the Condition Flags change according
When you execute the IORD instruction, the execution result is reflected in the Condition Flags.
The = flag turns ON when the reading process is completed. Input Condition Flags, such as = flag,
based on output branching from the same input condition as the IORD instruction.
circuit so that you execute the instruction in every cycle until you can start reading the data.
every cycle until = flag turns ON. Self-holding is released when = flag turns ON and contact B turns
ON upon completion of the reading process.
to the execution result of the instruction. Be sure to place the Condition Flags immediately after
the IORD instruction.
instructions.
When you read data from or write data to the Memory area of the same Special I/O Unit with the
IORD or IOWR instructions.
When you execute an I/O refresh on the same Special I/O Unit with the IORF or FIORF
Read switch
Precautions for Correct Use
Reference
A
B
CJ Position Control Units OPERATION MANUAL (CJ1W-NC214/234/414/434)
=
IORD
B
A
#1101
D400
D300