Yaskawa V7 Limit Switch - Manual (Page 2)

Date: 07/01/04, Rev: 04-07 Page 2 of 6 TM.V7SW.041
Background:
Forward and Reverse Inhibit multi-function inputs are specifically designed for drives used in simple linear
motion applications. By connecting the limit switches at opposite ends of the linear slide, operation in the
forward or reverse direction can be inhibited. This prevents damage to machinery while still allowing
motion on the opposite direction to come “off” the limit switch.
Additional Parameters:
No. Parameter Description Unit Setting Range Default
Access
Level
n045
Fwd/Rev Inhibit Mode
0: Run Command Cycle Not Required
1: Run Command Cycle Required
- 0 ~ 1 1
1st
function
n046 Fwd/Rev Inhibit Contact Type
0: N.O.
1: N.C.
- 0 ~ 1 1
1st
function
Additional Multi-function Input Settings:
These selections apply to parameters n050 ~ n056 (Terminals S1 ~ S7).
Setting Description
28 Forward Run Inhibit
29 Reverse Run Inhibit
Additional Alarms:
Display Description
FL Forward Limit (Forward Run Inhibit Input Closed)
RL Reverse Limit (Reverse Run Inhibit Input Closed)
Description of Functionality:
When the Forward Run Inhibit multi-function input is open
<1>
and the inverter is running in the forward
direction, it will stop by the method selected in n005. The inverter can only be run in the reverse direction
while the Forward Run Inhibit input is open
<1>
. If the forward run command is still in place when the
Forward Run Inhibit input closes
<1>
, and n045 = 0, the inverter will restart. If n045 = 1, the run command
must be cycled.
When the Reverse Run Inhibit multi-function input is open
<1>
and the inverter is running in the reverse
direction, it will stop by the method selected in n005. The inverter can only be run in the forward direction
while the Reverse Run Inhibit input is open
<1> . If the reverse run command is still in place when the
Reverse Run Inhibit input closes <1> , and n045 = 0, the inverter will restart. If n045 = 1, the run command
must be cycled.
The digital operator will flash “FL” when the Forward Run Inhibit multi-function input is closed. It will flash
“RL” when the Reverse Run Inhibit input is closed.
The above functionality is valid when n046 = 1 (N.C. contact type selected). When n046 = 0 (N.O. type
contact selected), operation is identical except the Forward and Reverse Run Inhibit commands become
active when the corresponding multi-function input is closed.
<1>
<1>