User`s manual

Serial communications 159
ACH550-01 User's Manual
Acceleration/deceleration ramp pair selection
Communication fault functions
Code Description Range
2201 ACC/DEC 1/2 SEL -6…6
Defines control for selection of acceleration/deceleration ramps.
• Ramps are defined in pairs, with one ramp for acceleration and one
ramp for deceleration.
7 =
COMM – Defines bit 10 of Command Word 1 (parameter 0301) as the
control for ramp pair selection.
•The command word is supplied through fieldbus communication.
2209 RAMP INPUT 0 -6…7
Defines control for forcing the speed to 0 with the currently used
deceleration ramp (see parameters 2203
DECELER TIME 1 and 2206
DECELER TIME 2).
7 =
COMM – Defines bit 13 of the Command Word 1 as the control for
forcing the speed to 0.
•The command word is supplied through fieldbus communication.
Code Description Range
3018 COMM FAULT FUNC 0…3
Defines the drive response if the fieldbus communication is lost.
0 =
NOT SEL – No response
1 =
FAULT – Displays a fault (28, SERIAL 1 ERR) and the drive coasts to
stop.
2 = CONST SP 7 – Displays an alarm (2005, IO COMM) and sets the speed
using 1208
CONST SPEED 7. This “alarm speed” remains active until
the fieldbus writes a new reference value.
3 =
LAST SPEED – Displays an alarm (2005, IO COMM) and sets the speed
using the last operating level. This value is the average speed over
the last 10 seconds. This “alarm speed” remains active until the
fieldbus writes a new reference value.
WARNING! If you select CONST SP 7, or LAST SPEED, make sure that
continued operation is safe when the fieldbus communication is lost.
3019 COMM FAULT TIME 0…600.0 s
Sets the communication fault time used with 3018
COMM FAULT FUNC.
• Brief interruptions in the fieldbus communication are not treated as
faults if they are less than the COMM FAULT TIME value.