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Installation manual
CNC 8055
CNC 8055i
7.
CONCEPTS
SOFT: V02.2X
Digital servo (CAN or Sercos)
• Reading and writing from a part-program or from a user channel.
• Reading and writing from the PLC channel.
Service channel. Changing parameter sets and gear ratios via Sercos
It is recommended to use this feature when the feedback is handled via Sercos (SERCOSLE = 1
or 2).
The drive may have up to 8 gear ratios (0 through 7). Sercos identifier 218, "GearRatioPreselection".
It may also have up to 8 parameter sets (0 through 7). Sercos identifier 217,
"ParameterSetPreselection".
The following write variables must be used to select these sets from the CNC:
The 4 least significant bits of these variables indicate the gear ratio and the other 4 the parameter
set to be selected.
To send this information to the drive, a high-level block must be executed in a part-program, PLC
channel or user channel as mentioned earlier.
It takes time to the drive to change the parameter set and the gear ratios. That is why a new PLC
mark has been defined SERPLCAC (M5562). This mark will be active from when the change is
requested until the drive assumes the new values. No other SETGE* change may be requested while
this mark is active because the command would be lost.
Read: (P*** = SVARaxis **)
Write: (SVARaxis** = P**)
Example: (P110 = SVARX 40)
It assigns to parameter P110 the value of the X axis variable with the identifier 40 which
corresponds to "VelocityFeedback"
Read: ... = CNCEX ((P*** = SVARaxis***), M1)
Write: ... = CNCEX ((SVARaxis** = P***), M1)
Example: ... = CNCEX (( SVARX 100= P120 ), M1
It assigns the value of parameter P120 to the X axis variable with identifier 100
(VelocityProportionalGain).
SETGEX, SETGEY, SETGEZ for the axes
SETGES for the main spindle
SSETGS for the second spindle
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