Communication Speed Setting (Twisted Bus System Only) - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

5 PARAMETER SETTINGS

5.2.6 Communication speed setting (twisted bus system only)

5 - 12
Set communication speed for the twisted bus system.
The communication speed can be selected in the Network parameter of the control
station.
Normal stations operate according to the communication speed set in the control
station. Therefore the communication speed setting in normal stations is not
necessary.
(1) Selection type
Select from the following items:
Item
Optical/coaxial
Twist [156kbps]
Twist [312kbps]
Twist [625kbps]
Twist [1.25Mbps]
Twist [2.5Mbps]
Twist [5Mbps]
Twist [10Mbps]
REMARKS
The communication speed can be checked in the communication speed setting
value (SW0069).
For details of SW, refer to Appendix 4.
(2) Precautions
(a) Total connection cable length must be within the range given in the
specifications. (Refer to Section 3.1.)
If the length is exceeded the range, the following problem may occur.
• Frequent communication error
• Continuous data link connection and disconnection
• No data link
(b) When "Optical/coaxial" is selected in the communication speed setting
parameter of the network parameter data link is performed at 156kbps.
Description
Set when the optical loop or coaxial bus system is used.
Set when the twisted bus system at 156kbps to 10Mbps is
used.
MELSEC-Q
5 - 12