CHAPTER 5.0 Functional Overview
5-31
CDS7324 (FORMERLY LSF-0819)
Rev. A
INSTALLATION & USER’S MANUAL
5.10.2.1
Digital Output Field and Mask
The user must define specific bits within a specific parameter, which is to be associated with a digital output. The
Field value of the parameter (i.e. a unique number identifying a specific parameter) must be entered into the
digital output field number parameter, to specify the parameter of interest. This field number is listed in the
parameter database, in the utilities panel of the GUI.
The bits within the field are specified by entering the appropriate mask into the digital ouptut mask parameter.
This mask is ANDed with the parameter specified by the field number to determine the digital output state.
For example, Bit 7 of the DS402 status word indicates a warning on the drive. If
digital_output_1_field_number
is
set to the field value of the
DS402_status_word
parameter (i.e. 1651), and
digital_output_1_mask
is set to 0x80,
then digital output 1 will be 0 in when no warnings are present, and will be 1 when a warning occurs.
The mask can select a number of bits in a parameter. If any of these bits are set, then the digital output will be 1,
otherwise the output will be 0.
5.10.2.2
Digital Output Invert Output
In a similar manner to the digital inputs, this parameter inverts the logic associated with a digital output. Default
operation is that if the bit is set in the parameter the output is set to 1, and when the bit is cleared the output is set
to 0. If the invert option is set, it will invert this logic, such that clearing the bit will set the digital output to 1 and
vice versa.
5.10.2.3
Default Settings
The default setting for digital output 1 is for the output to be set high when the drive is enabled.
The default setting for digital output 2 is for the output to be set high when self-protection current limiting is active.
The default setting for digital output 3 is for no output.
