Omron EJ1 - 07-2008, Руководство по эксплуатации

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Expansion Remote I/O Section 4-4
4-4-3 Procedure for Writing Parameters
This section describes how to write parameters using expansion remote I/O.
Allocating Expansion
Remote I/O
Parameters
Allocate memory to the following parameters to I/O 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 except for
the OUT Enable Bit.
Writing Parameters by
Using Memory
Operations
Use the following procedure to write parameters by using ladder program-
ming.
1,2,3... 1. Turn OFF the OUT Enable Bit.
First, always turn OFF the OUT Enable Bit. After the OUT Enable Bit is
turned OFF, the word that contains the Output Completed Flags will be
0000 hex.
2. Check that the word that contains the Output Completed Flags is 0000 hex.
3. Set the Write Parameter to the allocation number of the parameter to be
written. For the allocation numbers, refer to the
Allocation number for ex-
pansion remote I/O column in the table in 4-3-3 Parameters for Which Al-
location Is Possible .
Example: Allocation number for the set point = 27 (001B hex)
4. Set the values to write in the parameters for the unit numbers and channels
for the allocation number specified in step 3.
5. Turn ON the OUT Enable Bit. Writing will be performed when this bit turns
ON.
6. Check that the word containing the OUT Completed Flags is 0001 hex.
If the word is 0001 hex, then writing has been completed normally, and if it
is 8001 hex, an error has occurred in writing. If an error occurs, check the
following points.
• There are no parameters that corresponds to the allocation number.
• The write value in step 4 is outside the setting range.
• Communications cannot be performed with a unit number registered in
the configuration.
Area Parameter Description
OUT Area OUT Enable Bit Used to enable writing.
Always allocate the first word
of the OUT Area to this
parameter.
Write Parameter Used to set the allocation
number of the parameter to be
written. Always allocate mem-
ory to this parameter.
Parameters for specified unit
numbers and channels Set the values to write to the
parameters corresponding to
the specified allocation num-
ber. Allocate memory for the
required unit numbers and
channels.
IN Area Output Completed Flags Used to check that writing has
been completed. Always allo-
cate memory to this parame-
ter.