Programming D-3
DC590+ Series DC Digital Drive
The setting of the EMULATE 590P parameter (tag 162) in the CONFIGURE DRIVE function block affects the time
constants of the PID block and the linking of parameters in the function block diagram:
¾ When non-zero the drive emulates the functionality of links in earlier firmware versions of the 590P,
(firmware Versions 5.x and 7.x)
¾ When zero (0x0000) the behaviour changes so that the value is transferred, preserving the decimal place,
(firmware Version 8.x and onwards).
Refer to "Compatibility with Earlier Versions of Firmware", page D-7, for more information.
To maintain compatibility, the new firmware emulates the functionality and behavior of links in earlier firmware versions
by defaulting the EMULATE 590P parameter to 0x0001 (non-zero).
Figure 1 Operation of links (EMULATE 590P = non-zero : firmware Versions 5.x, 7.x, 8.x and onwards)
Figure 2 Operation of links (EMULATE 590P = zero : firmware Version 8.x and onwards)
The operation of a link is determined by the number of decimal places of each parameter. Previous firmware versions ignored the decimal place when
linking two parameters. For example, linking Analog Input 2 to the Jog Ramp rate gave a Ramp Rate of 526.1s for an input value of 52.61%. Compare
the Figure above.
An additional enhancement is that all values are now held to over 4 decimal places of precision. This is also true of values transferred via links. In the
above example, although the Jog Ramp Rate is shown as 59.7s, internally the value will match that of the output of Analog Input 2, to over 4 decimal
places.
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