6 Programming Features
151
Error code
* Refer to the constants list for constants that can be changed during opera-
tion.
Error
Code
Contents
01H
Function code error
• Function code from PLC is other than 03H, 08H, or 10H.
02H
Improper register number
• No register numbers to be accessed have been registered.
• Enter Command “0900H” (an exclusive-use register for write-in)
was read out.
03H
Improper quantity
• The number of data items to be read or written-in is not in the
range between 1 and 16.
• The number of data items in a message is not the value obtained
by multiplying the quantity by two in the write-in mode.
21H
Data setting error
• A simple upper/lower limit error occurred with control data or con-
stant write-in.
• A constant setting error occurred when a constant was written.
22H
Write-in mode error
• Attempt to write in a constant from PLC was made during run-
ning.*
• Attempt to write in an Enter Command from PLC was made dur-
ing running (n170=0).
• Attempt to write in a constant from PLC was made during UV
occurrence.
• Attempt to write in an Enter Command from PLC was made dur-
ing UV occurrence.
• Attempt to write in a constant other than n001=12, 13 (constant
initialization) from PLC was made during “F04” occurrence.
• Attempt to write in a constant from PLC was made while data
were being stored.
• Attempt to write in data exclusive for read-out from PLC was
made.
