Hi ,
In analog output module S7-400 partno(6ES7 432-1HF00-0AB0)  this AO module can be configure both 0-10V and 4-20mA & i have set to 4-20mA form the hardware configuration in Step 7 & according to module wiring details i connected the load in Card TB No-6 (+ve) & Card TB No-8 ( - Ve) but i am not getting variable 4-20mA . i am getting a fixed 8mA signal.
i measured the dc current (mA) accross:
TB-6 & TB-8 = 8 mA (constant)
TB-7 & TB-8 = 4mA (Constant)
i have used unscale block (FC106 ) from standard library function to produce variable 4-20mA but it is giving fixed 8mA.
** Card TB no - 26 : No Connection
regards 

Suman

Hi ,

Waiting for your expertise reply... 

Hello,

Analog Output Module SM 432; AO 8 x 13 Bit; (6ES7432-1HF00-0AB0)

• Maximum permissible common mode voltage between the channels and the channels against MANA is 3 VDC
• Unused Channels :To ensure that output channels of the SM 432; AO 8 x 13 Bit remain de-energized, you must disable the “Type of Output” parameter and leave the terminal open.