deceleration rate that is greater than the standard stop deceleration rate. The fast stop function as default is disabled, to enable the fast stop set Fast

Stop Enable (H26) = On.

The fast stop feature allows:

•

User defined fast stop deceleration rate

•

Faster stopping compared to the standard deceleration and jerk for commissioning / start up and inspection

•

Can be used to overcome hard stops due to standard deceleration and jerk during commissioning / start up and installation

Table 7-29 Fast stop parameters

Parameter

Fast Stop Enable (H26)

Fast Stop Deceleration Rate (G29) Fast stop deceleration rate only active when fast stop is enabled.

Speed References G02 to G10

Speed References V2 to V10

7.13.1

Fast stop using speed selection

When enabled, a fast stop can be initiated through a speed selection where the speed selection is 0 mm/s. The speed selection can be any of the

available speeds from V2 through to V10, with these being selected using an additional control input routed to the required speed selection.

The deceleration rate in Fast Stop Deceleration Rate (G29) is used following the selection of the speed at 0 mm/s for the fast stop. The stop jerk for

creep to floor operation in Creep Stop Jerk (G18) is no longer used, and a fixed time of 200 ms is used in order to provide smooth running from

deceleration to the final stop.

7.13.2

Fast stop using direction control

When enabled, a fast stop can be initiated using the direction input, this being active for either a single direction input or dual direction inputs.

The deceleration rate in Fast Stop Deceleration Rate (G29) is used following the direction input control. The stop jerk for creep to floor operation in

Creep Stop Jerk (G18) is no longer used, and a fixed time of 200 ms is used in order to run as smoothly as possible from deceleration to the final stop.

Figure 7-18 Fast stop

0 mm/s speed selection

•

Inspection speed removed and speed selection of 0 mm/s selected initiates a fast stop. If inspection speed only is removed a normal stop will be

carried out.

•

Direction input removed initiates a fast stop.

7.14

Rapid stop during acceleration

With fast stop using either speed selection or direction control, fast stop cannot be carried out during acceleration where the speed selection or

direction are removed. Acceleration will continue to the speed selection made during the start.

With rapid stop, where speed selection or direction are removed during acceleration, the deceleration will start immediately. Rapid stop during

acceleration is enabled with Rapid Slow Down Enable (H27)

The rapid stop during acceleration allows a stop to be initiated during the acceleration period, with the removal of the speed selections and with a fast

stop being carried out immediately. The end of acceleration jerk is set to zero to prevent any further increase in speed, allowing the deceleration to

start. The deceleration to stop for rapid stop during acceleration uses either:-

•

The standard profile parameters where fast stop is not enabled, Fast Stop Enable (H26) = Off (0)

•

The fast stop deceleration rate in Fast Stop Deceleration Rate (G29) and final fixed jerk of 200 ms where fast stop is enabled, Fast Stop Enable

(H26) = On (1).

172

Electrical

Getting

User Menu A

installation

started