Omron V500-R521B2 User Manual page 108

Section 5
Example of System Configuration
Troubleshooting of link unit
In case of no response (cannot receive) or garble
You can check the error condition with illumination condition of the operation indication lamp.
Operation indication lamp
RUN COMM
*1 Operation indication lamp repeats to blink other than during command transmission.
When only a specified link unit communication is abnormal
You can check the error condition with illumination condition of the operation indication lamp.
Operation indication lamp
RUN COMM
*2 Upper connection port p.100
V500-R521B2/C2
110
User's Manual
Lights out
:
ID ERR
• Connection of RS-232C cable (Wrong connection)
• Command format (Existence of [SOH])
• Inconsistency of communication condition setting on upper equipment
side (communication speed, etc.) and communication setting on the
link unit side
• RS-232C cable wiring (effect of circumference noise)
• Inconsistency of the machine No. designated with the command and
the machine No. setting on the link unit side
• Command format ([CR], calculation of check codes, distance of
command characters, etc.)
• RS-232C cable wiring (effect of circumference noise)
• There are 2 sets or more machine No. settings of the link unit on one
system (*1)
• Connection of RS-232C cable (Wrong connection)
• When connected to the upper equipment with RS-485, switching
timing (time) of communication with the upper equipment
• 24 VDC power source line check
Lights out
:
ID ERR
• Connection of RS-485 cable (Wrong connection)
• Connection of RS-232C cable (Wrong connection)
• RS signal control with the upper equipment (RS signal is always OFF
or turns ON after command transmission) (*2)
• Inconsistency of communication condition setting on upper equipment
side (communication speed, etc.) and communication setting on the
link unit side
• RS-485 cable wiring (effect of circumference noise)
• Inconsistency of communication condition setting on upper equipment
side (communication speed, etc.) and communication setting on the
link unit side
• RS signal control of the upper equipment (Turns OFF before ending
command transmission) (*2)
• RS signal control of the upper equipment (RS signal is always ON)
(*2)
• 24 VDC power source line check
: Illuminate
Check point
: Illuminate
Check point