High
−
level Instructions
3
−
365
Specifications for each item
The control data specified by [S1][S1+1] is specified as follows.
[S1]: Specifying transmission unit and transmission method
Specifies No. of transmisson words (H001 to H07F)
*According to the restrictions on the MODBUS protocol.
Word unit
transmission
[S1]:
H0
Bit No. of local
unit (H0 to HF)
Bit No. of remote
unit (H0 to HF)
[S1]:
Bit unit
transmission
H0 fixed
H8
[S1+1]: Specifying the remote unit
Unit No. (H01 to H63)
(1 to 99)
[S1+1]:
H0 fixed
Selects COM port
(H1 or H2)
(1) Specifying the transmission unit and transmission method [S1]
If data is to be sent in word units, specify the data volume, and if it is to be sent in bit units, specify the position of the
target bit.
* For word units, the maximum of 127 (7Fh) words can be transmitted as the transmission range is up to 254 bytes.
(2) Specifying the remote unit [S1+1]
Specify the remote unit with the unit number.
Specify either the COM1 or COM2 port from which data is transmitted to the remote unit.
Specify H1 if only one COM port is available.
(3) Specifying the area of the remote unit which is received by [S2] and [N].
Specify 0 for the device No. of [S2].
Specify the memory area of the remote unit in which the data to be transmitted is stored, specifying the type S2 and
the address N in combination.
[S2]:DT0, [N]:K100
DT100
Example)
(4) Specifying the area of the local unit by [D] in which the data to be received is stored
Specify the memory area of the local unit in which the data to be received is stored.
The MODBUS command is created according to the operands specified by [S1],[S1+1], [S2], [D], and
[N].
When being transmitted in word units: The command 01 (Y, R coil read), command 02 (WL, LD read),
command 03 (DT read) and command 04 (WL, LD read) can be transmitted.
When being transmitted in bit units: The command 01 (Y, R coil read) and command 02 (X contact
read) can be transmitted.
The transmission is executed adding the 2 bytes of CRC at the end after the MODBUS command has
been created.
FP
Σ
/FP
−
X/FP0R
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
Summary of Contents for FP-X
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