Omron G3PW, Руководство пользователя

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70
Communications Settings Section 6-1
2. Set the Communications Main Setting Number parameter [P25] to any
number between 1 and 8. The G3PW with each communications unit num-
ber will receive the MV from the Temperature Controller channel specified
by the Communications Main Setting Number.
Note Refer to the note on page 72 for information on the Communica-
tions Main Setting Numbers.
Note The EJ1 will automatically send the MV for the maximum number of G3PW
channels. User programming is not required.
Connecting to a Serial
Communications
Unit/Board in a PLC
The following settings are necessary to connect a PLC and G3PW Power
Controllers with serial communications. RS-485 is used for communications,
so up to 31 G3PW Power Controllers can be connected.
G3PW Settings
1,2,3... 1. Set all of the Communications Main Setting Number parameters [P25] to 1.
2. Set the communications unit numbers to any values between 0 and 99. (A
maximum of 31 nodes can be connected.)
PLC Settings Use the CMND instruction in the ladder program to send input variables to the
G3PW Power Controllers. Use a variable type of C1/81 and an address of
0000 for the communications main setting (MV) for each G3PW communica-
tions unit number.
Communications Main Setting Number: Specific Settings
Heater Heater Heater Heater
Communications frame for Unit 1
Communications frame for Unit 2
Communications frame for Unit 3
Communications frame for Unit 4
CompoWay/F (RS-485)
2) The G3PW with each communi-
cations unit number will receive
the MV from the Temperature
Controller channel specified by
the Communications Main Set-
ting Number.
1) Communications frames for the MV for all channels are sent from the EJ1 to
the G3PW according to the unit numbers. User programming is not required.
Unit 4
Unit 3
Unit 2 Unit 1
Communica-
tions Main
Setting
Number: 2 Communica-
tions Main
Setting
Number: 1
Communica-
tions Main
Setting
Number: 2 Communica-
tions Main
Setting
Number: 1
Ch1 MV Ch2 MV
Ch1 MV Ch2 MV
Ch1 MV Ch2 MV
Ch1 MV Ch2 MV
G3PW G3PW G3PW G3PW
Ch2
Ch1
TC2 EDU
Note: The MV for communications unit number 1 will be received if
there are more than 9 communications unit numbers.