Delta MMC120 - Manual (Page 62)

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registers and 4TTTTT represents the base address for the output registers . These are the
addresses at which the MMC120 is configured.
Memory Requirements
The MMC120 has non-volatile FLASH memory that can be used for parameter, profile
and event step storage. If you also want to store the parameters in the Programmable
Controller’s memory you must reserve 32 words (registers) of memory—16 per axis.
Tip: Use the monitor program to set up and modify the parameters, profiles and event
steps. Then move them to the programmable controller.
This memory contains the initialization parameters for the axis. The parameters are
arranged in the following order:
0 CONFIGURATION Word
1 SCALE
2 OFFSET
3 EXTEND LIMIT
4 RETRACT LIMIT
5 PROPORTIONAL GAIN
6 INTEGRAL GAIN
7 DIFFERENTIAL GAIN
8 EXTEND FEED FORWARD
9 RETRACT FEED FORWARD
10 EXTEND ACCELERATION FEED FORWARD
11 RETRACT ACCELERATION FEED FORWARD
12 DEAD BAND ELIMINATOR
13 IN POSITION
14 FOLLOWING ERROR
15 AUTO STOP
In addition to the parameter storage blocks, memory may be allocated for profile and
event step storage if these features are used.
Each profile requires four words of memory, and each module can use up to 16 profiles .
The first eight profiles can be changed from the PLC and all 16 can be changed from the
monitor program. Only enough memory must be allocated to hold the profiles used in all
the modules in the system. The profiles consist of Mode, Acceleration, Deceleration and
Speed information.
If you use
Event Control and want to store the step sequences on the PLC, you must
reserve eight registers for each step used.
The demo program on the monitor program disk shows an example of ladder logic for
transferring parameters, profiles and Event Control steps to and from the MMC120.