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191
Communications Settings
Section 7-1
Note
(1) Always set the port B communications protocol to Modbus (1). With ver-
sion
, if No. 3 of SW2 is ON when the power is turned ON, the pro-
tocol is set to Modbus regardless of the port B communications protocol
setting.
(2) The port B communications data length and port B communications stop
bits settings do not need to be changed.
When using an Interface Converter (e.g., K3SC), set the communications
data length for the Interface Converter to 8 bits, and set the communica-
tions stop bits according to the following.
If the port B communications parity is 0: None, then set the communica-
tions stop bits to 2 bits.
If the port B communications parity is 1: Even, or 2: Odd, then set the
communications stop bits to 1 bit.
7-1-2
Unit Number Setting
The unit number is set first. The setting is made on SW1 and SW2 on the front
of the EJ1. For information on the setting method, refer to
1-1-4 Using Setting
Switches
.
7-1-3
Other Communications Settings
The communications protocol, communications band rate, communications
data length, communications parity, and send data wait time are set using the
CX-Thermo Support Software.
When the above settings are changed, the changes will not be enabled until
the EJ1 is reset or the power is cycled.
With V1.2, the communications protocol and baud rate can be set on switch
SW2. Refer to
Setting Switch 2 (SW2) Settings
on page 4 for the setting pro-
cedure.
7-1-4
Send Data Wait Time
The send data wait time setting is used to adjust the time the host computer
takes to switch from sending to receiving. Specifically, the send data wait time
for the EJ1 is the time from after a response has been created after data has
been received until the EJ1 switches to sending.
The setting of the Send Wait Time parameter can be shortened to reduce the
communications time at the host device as long as there are no problems.
Port B communications
parity
0: None
1: Even
2: Odd (bit)
1: Even (bit)
Communications
Port B send data wait
time
0 to 99 (ms)
5 (ms)
Communications
Parameter name
Setting range
Default
Setting method
V1.2
V1.2
Host device
Send status
Send
Send
Receive
Receive
Send status
Receive status
Receive status
Response created
Send data wait time
EJ1
Summary of Contents for EJ1 EtherCAT
Page 2: ...EJ1 Modular Temperature Controllers User s Manual Revised July 2008 ...
Page 3: ...iv ...
Page 19: ...xx ...
Page 213: ...188 Detailed Description of Services Section 6 4 ...
Page 227: ...202 Detailed Description of Services Section 7 5 ...
Page 303: ...278 Index ...
Page 305: ......