Siemens SINUMERIK 840D sl Function Manual page 375

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SIMODRIVE 611 analog (FDD)

Fixed clamping torque

A fixed clamping torque is implemented by entering a fixed torque limitation in a free gear

stage in the drive actuator (setting parameter 039). When the "Travel to fixed stop function"

is selected, the PLC switches over to the unassigned gear stage of the drive actuator, thus

activating the torque limitation.

Setpoints must be injected via terminals 56/14.

Programmable clamping torque

In this case, the PLC switches the drive actuator from speedcontrolled into torquecontrolled

operation after the fixed stop is reached. The NC can therefore input a variable clamping

Setpoints must be injected via terminals 56/14.

/IAA/ Commissioning instruction SIMODRIVE 611 analog system

Caxis operation

The control system has to switch the spindle into C-axis mode before the "Travel to fixed

stop" function is selected. The PLC does this by activating one of the programmable

terminals E1-D9 (e.g. terminal E1) of the drive actuator.

The NC detects that the function "travel to fixed stop" is selected via the command

FXS[x]=1 and signals the PLC via the IS "Activate travel to fixed stop" (DB31, ... DBX62.4)

that the function has been selected.

As a result, the PLC activates the unassigned gear stage, in which the torque limitation is

effective, by means of programmable terminals E1 - E9 of the drive actuator. It then switches

the speed controller monitor off (one terminal (E1-E9) to deactivate error F11 of drive

If the machine data:

MD37060 FIXED_STOP_ACKN_MASK

is set correspondingly, the acknowledgement of the PLC via the NST

"Enable travel to fixed stop" (DB31, ... DBX3.1) is awaited and after that the function is

(This acknowledgment should always be programmed for analog drives for safety reasons,

i.e. so that the motion is not started before the torque has been limited).

Basic logic functions: Travel to fixed stop (F1)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

Detailed Description

2.3 Travel to fixed stop with analog drives

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