Mc_Changedynamic (Change Dynamc Settings For The Axis) Instruction - Siemens S7-1200 System Manual

Technology instructions
9.3 Motion control
9.3.5.11

MC_ChangeDynamic (Change dynamc settings for the axis) instruction

Table 9- 48 MC_ChangeDynamic instruction
LAD / FBD
STEP 7 automatically creates the DB when you insert the instruction.
1
In the SCL example, "MC_ChangeDynamic_DB " is the name of the instance DB.
2
Table 9- 49 Parameters for the MC_ChangeDynamic instruction
Parameter and type
Axis
Execute
ChangeRampUp
RampUpTime
ChangeRampDown
RampDownTime
ChangeEmergency
476
SCL
"MC_ChangeDynamic_DB"(
Execute:=_bool_in_,
ChangeRampUp:=_bool_in_,
RampUpTime:=_real_in_,
ChangeRampDown:=_bool_in_,
RampDownTime:=_real_in_,
ChangeEmergency:=_bool_in_,
EmergencyRampTime:=_real_in_,
ChangeJerkTime:=_bool_in_,
JerkTime:=_real_in_,
Done=>_bool_out_,
Error=>_bool_out_,
ErrorID=>_word_out_,
ErrorInfo=>_word_out_);
Data type
IN TO_Axis_1
IN Bool
IN Bool
IN Real
IN Bool
IN Real
IN Bool
Description
Axis technology object
Start of the command with a positive edge. Default value:
FALSE
TRUE = Change ramp-up time in line with input parameter
"RampUpTime". Default value: FALSE
Time (in seconds) to accelerate from standstill to the configured
maximum velocity without jerk limit. Default value: 5.00
The change will influence the tag <Axis name>.
Config.DynamicDefaults.Acceleration. The effectiveness of the
change is shown in the description of this tag.
TRUE = Change ramp-down time in line with input parameter
"RampDownTime". Default value: FALSE
Time (in seconds) to decelerate axis from the configured
maximum velocity to standstill without jerk limiter. Default value:
5.00
The change will influence the tag <Axis name>.
Config.DynamicDefaults.Deceleration. The effectiveness of the
change is shown in the description of this tag.
TRUE = Change emergency stop ramp-down time in line with
input parameter "EmergencyRampTime" Default value: FALSE
Description
Changes the dynamic settings of
a motion control axis:
Change the ramp-up time
•
(acceleration) value
Change the ramp-down time
•
(deceleration) value
Change the emergency stop
•
ramp-down time (emergency
stop deceleration) value
Change the smoothing time
•
(jerk) value
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG