Omron DeviceNet CV Series Operation Manual page 295

RS-232C Units
Note
PORT RESET
278
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: CustomerService@valin.com
Response Block
No. of received
bytes
Parameters
Instance ID (Command)
Specifies the port that reads the reception buffer data in hexadecimal as fol-
lows:
02 Hex: Port 1
03 Hex: Port 2
Receive Data (Response)
Stores the data read from the specified port's reception buffer. The data is
stored in words from the leftmost byte to the rightmost byte as shown in the
following diagram.
Bit
First word
First word +1
First word +2
1. RS-232C ports 1 and 2 of the RS-232C Unit each have a reception buffer
of 1,024 bytes, and up to a maximum of 1,024 bytes of data can be read
from the Master at any given time. From an OMRON DeviceNet Master
however, the maximum amount of data that can be read at one time is 152
bytes. Be sure to configure the data so that the 152-byte read data limit is
not exceeded.
2. When data is read from an OMRON DeviceNet Master, the number of read
bytes is stored as a CMND instruction (CV-series PLCs) or IOWR instruc-
tion (C200HX/HG/HE PLCs) parameter, so it will be requested.
3. When an odd number of bytes of data are sent, the last data will be set in
the leftmost bits of the last word.
4. Before using this command, be sure that the communications status Re-
ceived Flag (Port 1: bit 3, Port 2: bit 11) allocated in the Master's IN Area
is ON (data in the reception buffer). If the command is executed while the
Flag is OFF (no data in the reception buffer), and error will occur (error
code 1800 Hex).
Resets the RS-232C Unit's specified port. To change the parameter settings
using the PARAMETER SET command, either reset the port using the PORT
RESET command or restart the RS-232C Unit.
Command Block
Destination
node address
1,024 bytes max.
Service Receive data
code
Source node address
(1)
(3)
(5)
××
05 00 94 00
Class ID Instance ID
Service Code
Section 6-2
(2)
(4)
(6)