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69
Expansion Remote I/O
Section 4-4
lating more than 100 parameters. Even if the number of parameters to be read
and written increases, modifications can be handled simply by changing oper-
ations in the memory of the master.
Note a) The parameters that can be specified are the ones that can be
changed during operation.
b) Expansion remote I/O cannot be used with simple I/O allocations.
4-4-2
Procedure for Reading Parameters
This section describes how to read parameters using expansion remote I/O.
Allocating Expansion
Remote I/O
Parameters
Allocate the following parameters in I/O memory by using the Configurator.
For information on allocation methods, refer to
4-3-2 Creating Allocation Data
.
Note
There are no restrictions on the locations for allocations.
Reading Parameters
by Using Memory
Operations
Use the following procedure to read parameters by using ladder program-
ming.
1,2,3...
1.
Set the Read Parameter to the allocation number of the parameter to be
read. For the allocation numbers, refer to the
Allocation number for expan-
sion remote I/O
column in the table in
4-3-3 Parameters for Which Alloca-
tion Is Possible
.
Example: Allocation number for the set point = 18 (0012 hex)
2.
Check that the allocation number specified in step 1 is set in the Read Pa-
rameter Monitor. If the same allocation number is set as in step 1, then the
specified parameter has been read normally. FFFF hex will be set in the
following cases.
• The Read Parameter is 0 at startup.
• There is no parameter that corresponds to the allocation number.
n+0
n+1
n+2
n+3
n+4
n+5
n+6
Address
m+0
m+1
m+2
m+3
m+4
m+5
m+6
Output Completed Flags
Read Parameter Monitor
---
Unit 0, ch1 parameter
Unit 0, ch2 parameter
Unit 1, ch1 parameter
Unit 1, ch2 parameter
:
OUT Enable Bit
Read Parameter
Write Parameter
Unit 0, ch1 parameter
Unit 0, ch2 parameter
Unit 1, ch1 parameter
Unit 1, ch2 parameter
:
The parameter set in the Write
Parameter can be written.
Address
PLC Memory OUT Area
PLC Memory IN Area
The parameter set in the
Read Parameter can be read.
Area
Parameter
Description
OUT Area
Read Parameter
Used to the allocation number of the parame-
ter to be read. Always allocate memory to
this parameter.
IN Area
Read Parameter Monitor Used to confirm that reading has been com-
pleted. Always allocate memory to this
parameter.
Parameters for specified
unit numbers and chan-
nels
The values of the parameters corresponding
to the specified allocation number will be set.
Allocate memory for the required unit num-
bers and channels.
Содержание EJ1 - 07-2008
Страница 1: ...DeviceNet Communications Unit for EJ1 Temperature Controllers Cat No H155 E1 02 OPERATION MANUAL...
Страница 2: ...DeviceNet Communications Unit for EJ1 Temperature Controllers Operation Manual Revised July 2008...
Страница 3: ...iv...
Страница 19: ...xx...
Страница 33: ...14 Initial Temperature Controller Settings Section 1 4...
Страница 53: ...34 Wiring the Temperature Controllers Section 3 4...
Страница 101: ...82 Ladder Programming Examples Section 4 6...
Страница 143: ...124 Sending Explicit Messages Section 6 5...
Страница 155: ...136 Message Communications Characteristics Section 7 2...
Страница 163: ...144 Maintenance Section 8 2...
Страница 189: ...170 Allocation Numbers for Configurators Manufactured by Other Companies Appendix B...
Страница 197: ...178 Index...