User manual
  Error Messages and Troubleshooting 
  Error Messages  7 
7-9 
Table 7-1. Error Messages (cont.) 
Error Code  Error Message  Causes and Solutions 
Error 421  Not a DIO channel 
Cause: Error occurs when a user attempts to set a DIO 
channel on any channel other than Ch401. 
Solution: Check the parameter value and try again. 
Error 422 
Not a totalizer 
channel 
Cause: Error occurs when a user attempts to set a TOT 
channel on any channel other than Ch402. 
Solution: Check the parameter value and try again. 
Error 423 
Not an analog 
channel 
Cause: Error occurs when a user attempts to set an analog 
channel on any channel other than Chx01 through Chx22. 
Solution: Check the parameter value and try again 
Error 424 
3-wire or 4-wire not 
allowed on channel 
Cause: Channel cannot be configured for 3-wire or 4-wire 
because (1.) the input type does not support it (2.) the 
channel is not a dedicated sense channel. 
Solution: Check to make sure that the sense wires are in the 
sense terminals and not the input terminals. When a sense is 
configured, it is configured on the channel associated with the 
input terminal and automatically reserves the sense channel 
directly across from the input. See Chapter 2 and Chapter 3 
for more information.  
Error 425 
Function not allowed 
on current channel 
Cause: Chx21 or Chx22 can only be configured as a current 
channel. 
Solution: Set up the input on a different channel. 
Error 428 
Parameter value out 
of range 
Cause: Parameter in command exceeds the limit. 
Solution: Check the parameter value and try again. 
Error 429 
Channel limit 
exceeded 
Cause: A single math channel is configured to use more than 
10 channels. 
Solution: Limit the number of math channels to no more than 
10 with the CALCulate:MATH:SOURce command. 
Error 430  String too long 
Cause: Too many characters are included in a string 
parameter. For example,Probe ID (max. 24 characters); Unit 
(max. 3 characters); Channel label (max. 16 characters); Test 
setup file name (max. 8 characters). 
Solution: Check the parameter value and try again. 










