HMS A8NDPV1 Instruction Manual page 58

GX Works2 (Q-CPU) Simple Ladder Telegram 1 example
After powering up the inverter and Profibus master, connection will be established. Expect to
see bit 6 (Switching on inhibated) set in ZSW1. Refer to the simplified state diagram (chapter
GX Works2 (Q-CPU) Telegram 1 example), dependent on control word 1 (STW1).
Control Word 1 (STW1) description
State / Bit combination Bit 10
Description
Switching on Inhibited
Ready To Switch On
Switched On
Operation
Rotation
Fault reset
Both No Coast Stop and No Quick Stop need to be set to reset the Switching On Inhibited bit
in ZSW1. To do this set bits 1 and 2 in STW1, that is D2000.
Input the following ladder to allow the inverter to enter "Ready For Switching On" status, after
connection is established, and initialization command is given (M0).
This initialization will result in setting bit 0 in ZSW1 (Ready To Switch On). Switch on the in-
verter, and start operation. To do this enable bits 0 (ON/Off), 3 (enable operation), and 10
(Control By PLC) of STW1; while leaving bits 1 and 2 enabled.
At this moment it is also possible to set the desired rotation frequency. Assuming the motor
is rated for 50 Hz (inverter parameter 3) and a frequency of 10 Hz is requested, set 20% of the
rated motor speed to achieve this frequency. The value in Profidrive to allow full power is
16384, so setting 20% of this value (3276,8 round to 3277) will give the expected result. This
value shall be set in NSOLL_A (D2001).
Add the following ladder block to enable rotation command after initialization, and giving ro-
tation command (M1).
48
Bit 7 Bit 3
Fault
Control By Enable
acknowl-
PLC operation
edge
- - -
- - -
- - -
- - -
- - 1
1 - 1
- 0=>1 -
Get Started
Bit 2 Bit 1 Bit 0
No quick No coast
On
stop stop
- 0 -
0 - -
1 1 -
1 1 1
1 1 1
1 1 1
- - -
Doc.Id. HMSI-216-127
Doc.Rev. 1.01