User Manual Chapter 5
GFK-1742F Jan 2020
DSM314 to Host Controller Interface 150
4.06 Force Analog Output. Each axis connector supports one analog output signal. The
Force Analog Output immediate command may be used in the CPU application
program to set the value of this DC voltage output. The Force Analog Output
command operates one of the analog outputs on DSM faceplate connector C or D in
Digital mode, or in Analog Velocity mode, on connector A, B, C, or D. Multiple Force
Analog Output commands can be used to operate outputs on different connectors
by using the appropriate %AQ word offsets (see the paragraph before Table 46). A
Force Analog Output command has a range of +32000 (+10.00 Vdc) to -32000 (-
10.00 Vdc). When the axis is configured for Analog Torque mode the Force Analog
output command is NOT available.
Note: It is necessary to enable the applicable %Q “Enable Drive” bit (there is one for each axis)
to activate the analog output value set by this command. This differs from IC693DSM302
functionality.
There are two requirements to sustain the forced analog output voltage: (1) the
Force Analog Output command and value must remain continuously in the %AQ
data, and (2) the associated %Q “Enable Drive” bit must be on. The %Q “Enable
Drive” bit can be used to switch the analog output voltage on and off.
When a Force Analog Output command is active for a given axis, any other %AQ
immediate command for that axis will remove the Force Analog Output command
and turn off the associated analog output.
There are some differences between the Digital and Analog Axis Modes when using
this command, which are detailed below:
Digital Mode
•
The Force Analog Output command can only be used on connectors C and D
in Digital mode (in Digital mode, both Axis 1 and Axis 2, on connectors A and
B respectively, must be digital). In fact, Force Analog Output is the default
signal on connectors C and D in Digital mode.
•
If Axes 1 and 2 (connectors A and B) are configured for digital servo, their
analog outputs are used only for servo tuning, and this function cannot be
overridden by the Force Analog Output command. Issuing a Force Analog
Output command to a digital axis (connector A or B) will have no effect, and
no error will be reported.
•
In Digital mode, a Force Analog Output signal can be overridden if another
signal is routed to connector C or D by the Select Analog Output Mode
command. If the default Force Analog Output command has been overridden
on connectors C or D, it can be reinstated by either (1) issuing the immediate
command Select Analog Output (Signal Code 00) to each affected axis or (2)
power cycling the DSM314. See Section 4.25, “Select Analog Output Mode.”
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