3240h Digital Inputs Control

3240_h:01_h (Special Function Enable): This bit allows special functions of an input to be switched off (value "0") or on (value "1"). If input 1 is not used as, e.g., a negative limit switch, the special function must be switched off to prevent an erroneous response to the signal generator. The object has no effect on bits 16 to 31.

The firmware evaluates the following bits:

• Bit 0: Negative limit switch
• Bit 1: Positive limit switch
• Bit 2: Home switch

If, for example, two limit switches and one home switch are used, bits 0–2 in 3240_h:01_h must be set to "1".

3240_h:02_h (Function Inverted): This bit switches from normally open logic (a logical high level at the input yields the value "1" in object 60FD_h) to normally closed logic (the logical high level at the input yields the value "0"). This applies for the special functions (except for the clock and direction inputs) and for the normal inputs. If the bit has the value "0", normally open logic applies; for the value "1", normally closed logic applies.

3240_h:03_h (Force Enable): This bit switches on the software simulation of input values if it is set to "1". In this case, the actual values are no longer used in object 3240_h:04_h, but rather the set values for the respective input.

3240_h:04_h (Force Value): This bit specifies the value that is to be read as the input value if the same bit was set in object 3240_h:03_h.

3240_h:05_h (Raw Value): This object contains the unmodified input value.

3240_h:06_h (Input Range Select): This can be used to switch inputs – that are equipped with this function – from the switching threshold of 5 V (bit is "0") to the switching threshold of 24 V (bit is "1"). Bit 0 corresponds to input 1 here, bit 1 to input 2, etc.

60FD_h (Digital Inputs): This object contains a summary of the inputs and the special functions.