Omron EJ1

152
Detailed Description of Services
Section 6-4
6-4-5 Composite Registration Read
This service reads in order the contents of addresses specified in a variable
area composite read registration.
■ Command
Service Request PDU
■ Response
Service Response PDU
1. Response Codes
2. Variable Type
Refer to Parameter List on page 193.
3. No. of Read Data Items
MRC
2
01
SRC
2
10
Response code Error name Cause
1001 Command too long The command is too long.
110B Response too long The number of elements exceeds the
maximum.
7011 Operation error (7011) The command cannot be executed due
to a device error.
0000 Normal completion Processing was completed normally.
Read data length No. of read data items
For double-word (8-digit) variable type 20 max. (0014H)
For word (4-digit) variable type
MRC
2
4
SRC
2
2
2
0110
Response
code
Variable
type
Read data
Read data
Variable
type
No. of elements × 8 or 4
No. of elements × 8 or 4