Omron G3PW - MANUAL 2 User Manual page 87

Communications Settings
Send Wait Time
72
Note Communications Main Setting Numbers
The Communications Main Setting Number is set in a G3PW Power Controller
to specify the EJ1 channel from which the MV is to be received for the com-
munications unit number.
As shown below, the communications frame sent by the EJ1 contains the MVs
in the order of the channel numbers (MV for four channels for a TC4 Unit).
The Communications Main Setting Number specifies the channel number
from which the G3PW is to received the MV as input data.
Normally, the Communications Main Setting Number parameter [P25] is set to
specify automatic assignment so that the channel number will be the same as
the communications unit number. (For example, the MV from channel 1 is
received by the G3PW with communications unit number 1.) The Communica-
tions Main Setting Number can be set as desired to write the MV from channel
1 to the G3PW with any communications unit number from 2 to 4.
Connecting to an EJ1 Modular Temperature Controller
Set the Communications Main Setting Number [P25] to 0 (automatic assignment).
EJ1
TC4
CompoWay/F
(RS-485)
The MVs from the EJ1 are received according to the Communications Main
Setting Number. When automatic assignment is used, the number of the EJ1
channel will be the same as the communications unit number of the G3PW.
G3PW
Unit 1
Communica-
tions Main Set-
ting Number: 1
Note When connecting to a PLC, set the Communications Main Setting
Number for all G3PW Power Controllers to 1.
The send wait time is used to adjust the time required for the host to switch
from sending to receiving status. For the G3PW, this adjusts the time between
creating a response after receiving a transmission and switching to send sta-
tus.
Host Send status
Send
G3PW
Response created
If switching time will not cause problems, the send wait time can be shortened
to reduce the communications time with the host.
Communications frames for the MV for all channels are
automatically sent from the EJ1 to the G3PW according to the
communications unit numbers. User programming is not required.
Ch3 MV
Ch1 MV Ch2 MV Ch4 MV
Ch3 MV
Ch1 MV Ch2 MV Ch4 MV
Ch3 MV
Ch1 MV Ch2 MV Ch4 MV
Ch3 MV
Ch1 MV Ch2 MV Ch4 MV
G3PW G3PW G3PW
Unit 2 Unit 4
Unit 3
Communica-
Communica- Communica-
tions Main Set- tions Main Set- tions Main Set-
ting Number: 2
ting Number: 3 ting Number: 4
Receive status
Receive Send
Send status
Receive status
Send wait time
Section 6-1
Communications frame for Unit 1
Communications frame for Unit 2
Communications frame for Unit 3
Communications frame for Unit 4
Receive