SIM Board Insertion and Removal

Outputs

Use the Transfer Output Status (TOUT) command to check the status of the outputs. Use the Output State (OUT) command to change the outputs. Use a voltage meter to check individual outputs at the screw terminals (J4) of the VM24 to verify that the voltage level toggles between Ground and (Vo-2). [The output level should be approximately 2 volts less than the user supplied voltage Vo.]

If one output does not appear to toggle, check all other outputs. If none of the outputs will toggle, check Vo again. If some outputs will toggle, and some won't (after verifying that they toggle properly at the 6000 Series unit I/O connector), the corresponding SIM8-OUT or SIM8-4X4 board isn't seated properly or has been damaged. (See page 9.)

Inputs

Use the Transfer Input Status (TIN) command to check the status of the inputs. Use the Input Active Level (INLVL) command to define the active state of all programmable inputs. Alternate between applying supply voltage Vi to an input and grounding it, using the TIN command to verify that the input toggles.

If one input does not appear to toggle, check all other inputs. If none of the inputs will toggle, check Vi again. If some inputs will toggle, and some won't (after verifying that they toggle properly at the 6000 Series unit I/O connector), the corresponding SIM8-IN or SIM8-4X4 board isn't seated properly or has been damaged. (See page 9.)

In the event that an I/O board needs to be replaced, the I/O boards must be inserted and removed from the VM24 in a particular order due to the limited clearance between the sockets. Remove all power to the VM24 before removing or inserting an I/O board, including the +5V from the connection to the 6000 Series Controller/Indexer at connector J4. When removing I/O boards, remove the board from the J1 slot first, J2 second, and then J3. When inserting I/O boards, insert the board into the J3 slot first, J2 second, and then J1.

Troubleshooting 23