Delta AH500 Manual page 699

When the input /output mode of the analog module is negative voltage or negative current,
the corresponding digital value is -32000~32000; for example, the modes are -10V~+10V,
and -20mA~20mA, the corresponding digital values are both -32000~32000.
18. Click "Extensions" on the left-side window and then the following settings are done.
(The settings here are default. For the meaning of each option, please refer to section 10.2 in
the SYCON.net help.)
Chapter 14 Remote I/O Communication Module AHRTU-PFBS
14-69