Reference Manual Rev 1.13 
 
004R-646-113  Page 93 
14.2.3.  Error Handling 
If a command cannot be processed, the indicator returns an error.  The ERROR bit 
in the ADDR field is set and the DATA field contains the Error Code as follows: 
 
Error  DATA  Description 
Unknown Error  C000
H
  Error is of unknown type 
Not Implemented Error  A000
H
  Feature not implemented on this device 
Access Denied  9000
H
  Passcode required to access this register 
Data Under Range  8800
H
  Data too low for this register     
Data Over Range  8400
H
  Data too high for this register 
Illegal Value  8200
H
  Data not compatible with this register  
Illegal Operation  8100
H
  CMD field unknown 
Bad parameter  8040
H
  Parameter not valid for this execute register    
Menu in Use  8020
H
  Cannot modify register values while SETUP 
menus are active 
Viewer Mode required  8010
H
  Advanced operation chosen which requires 
the instrument to be in viewer mode. 
Checksum required  8008
H
  A checksum is required for the chosen 
command. 
Table 6: Network error codes 
14.2.4.  Ring Network Enhancement 
Instruments with software revision V2.31+ can be configured in a Ring Network via a 
M42xx module (software revision 1.01+). This requires the central computer to send 
additional  framing  characters,  ‘Echo-On’  (=<DC2>  =ASCII  12  H)  and  ‘Echo-Off’ 
(=<DC4> =ASCII 14 H) around each command. Below is an example Ring Network 
command and response: 
<DC2>20110150:<CR><LF> 
<DC4> 
 
<DC2>20110150:<CR><LF> 
81110150:07/01/2030 17-29<CR><LF> 
82110150:07/01/2030 17-30<CR><LF> 
<DC4> 
14.2.5.  Calibrating an instrument over a network 
An  instrument  can  be  calibrated  over  a  network  using  the  network  protocol.   The 
registers relating to calibration are listed in Appendix 3: Communications Registers 
page 123 and marked with the symbol “*”.  Note that changing the calibration of an 
instrument via the network will increment the calibration counters and void the scale 
certification.