20
YASKAWA
SIEP C730600 0IB Modbus TCP/IP Technical Manual
•
Daisy-Chained Topology
Use the communication connectors CN1A (Port 1) and CN1B (Port 2) at the same time. A switch is not
necessary for this connection.
Note:
•
This option does not support STP and RSTP.
•
To use this option in a ring topology, prepare a separate device that supports STP and RSTP in the same network.
•
If the link speed of Port 1 is different than the link speed of Port 2, it will trigger a
PA1 [PLC Alarm 1]
and the drive will not send data
between the ports. To prevent this alarm, set
F7-14 = 1 [Duplex Mode Selection = Auto/Auto (Auto Negotiation/Auto Negotiation)]
and
set the two connected nodes to the same link speed, set the two connected nodes to the same speed, and make sure that
F7-15 ≠ 101 or
102 [Communication Speed Selection ≠ 10/100 Mbps (10 Mbps/100 Mbps) or 100/10 Mbps (100 Mbps/10 Mbps)]
.
A - PLC
B - Switch
C - Drive
Figure 5.9 Communication Cable Wiring
6
Related Drive Parameters
These parameters set the drive for operation with the option. Make sure that the parameter settings in this table are
correct before you start network communications.
Note:
•
Hex.: MEMOBUS addresses that you can use to change parameters over network communication are represented in hexadecimal
numbers.
•
Expert: The parameter that is available in Expert Mode only. When
A1-01 = 3 [Access Level Selection = Expert Level]
, Expert Mode
parameters can be displayed on and set with the keypad.
No.
(Hex.)
Name
Description
Default
(Range)
b1-01
(0180)
Frequency Reference
Selection 1
Selects the input method for frequency reference.
0 : Keypad
1 : Analog Input
2 : Memobus/Modbus Communications
3 : Option PCB
4 : Pulse Train Input
Note:
•
Set
b1-01 = 3
to use the master device to control the frequency reference of the drive.
•
The default setting is different for different drives. Refer to the instruction manual of your
specific drive for more information.
1
(0 - 4)
b1-02
(0181)
Run Command Selection 1
Sets the input method for the Run command.
0 : Keypad
1 : Digital Input
2 : Memobus/Modbus Communications
3 : Option PCB
7 : AUTO C Term Run
8 : AUTO C Serial Run
9 : AUTO C Option Run
1
(0 - 9)
