43
7 OPTION
43
OPTION
Chapter
7
Example) Read the contents of linked with indicated value (address 30004).
Keep in mind that the relative address for reading the linked with indicated value is 0x03.
The example shows the case where the indicated value of the F331 is as follows:
05 (0x05) Write single coil
A slave coil is changed to ON or OFF.
If broadcast (0) is specified, all slave coils of the same address are rewritten.
To request, specify the coil address and output value.
0xFF and 0x00 correspond to ON, and 0x00 and 0x00 correspond to OFF.
No change is made with other data, which are considered as improper data.
Example) Turn on the hold/judge ON (address 00001).
Keep in mind that the relative address for writing in the hold/judge ON is 0x00.
In the case of normal writing, the response becomes identical to the request.
* To confirm coil execution, judge as complete with a normal response.
[Request]
Function 04
[Response]
Function 04
Start address; higher 00 Number of data bytes 02
Start address; lower 03
Linked with indicated value
(higher)
03
Number of registers;
higher
00
Linked with indicated value
(lower)
E8
Number of registers;
lower
01
Linked with indicated value: 1000 (0x03E8)
[Request]
Function 1 byte 0x05
Start address 2
bytes 0x0000 - 0xFFFF
Output data 2
bytes 0x0000 or 0xFF00
[Response]
Function 1 byte 0x05
Start address 2 bytes 0x0000 - 0xFFFF
Output data 2
bytes 0x0000 or 0xFF00
[Error response]
Error code 1 byte 0x85 (function + 0x80)
Exception code 1 byte 01 or 02 or 03
[Request]
Function 05
[Response]
Function 05
Start address; higher 00 Start address; higher 00
Start address; lower 00 Start address; lower 00
Hold/judge ON; higher FF Hold/judge ON; higher FF
Hold/judge ON; lower 00 Hold/judge ON; lower 00
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