Technical data

Chapter 4 – Communication
4-6 RS485 and RS232 Adapter Installation and Start-up Guide
Example on Using the Control Word
The following example shows how to use the Control Word to start the drive.
When the power is connected for the first time, the state of the drive (see the
state machine in Figure 4-1) is
NOT READY TO SWITCH ON. Control Word is used
to step through the state machine states until
OPERATING state is reached,
meaning that the drive is running and follows the given reference.
Table 4-5 Using the Control Word.
This example assumes that the ACS 160 is in remote control, that external
control place 1 (EXT1) is the active control place (as selected by parameter
1102), and that EXT1 start and stop commands are received through serial
communication (parameter 1001).
Control Word Value Description
Step 1 CW = 0000 0000 0000 0110 When this value is written, drive
state changes to
READY TO SWITCH
ON.
Step 2 Wait at least 100 ms before
proceeding.
Step 3 CW = 0000 0000 0000 0111 When this value is written, drive
state changes to
READY TO OPERATE.
Step 4 CW = 0000 0000 0000 1111 When this value is written, the drive
starts, but will not accelerate. Drive
state changes to
OPERATION
ENABLED.
Step 5 CW = 0000 0000 0010 1111 When this value is written, the ramp
function generator (RFG) output is
released. Drive state changes to
RFG: ACCELERATOR ENABLED.
Step 6 CW = 0000 0000 0110 1111 When this value is written, the ramp
function generator (RFG) input is
released. Drive state changes to
OPERATING. Drive will accelerate to
the given reference and will follow
the reference.
bit 0bit 15