Slave, safe limited speed status only mode – Rockwell Automation 21G PowerFlex 750-Series AC Drives Reference Manual User Manual
Page 107
Rockwell Automation Publication 750-RM001F-EN-P - February 2012
107
Slave Modes for Multi-axis Cascaded Systems
Chapter 8
Slave, Safe Limited Speed
Status Only Mode
When properly configured for Slave, Safe Limited Speed Status Only mode, the
Safe Speed Monitor Option module performs the same functions as Safe Limited
Speed Status Only mode as described on
. However, the safety option
regards the Door Monitor input as a Door Control output from an upstream
axis, and performs a logical AND with its internal Door Control signal to form
the cascaded Door Control output.
The SLS_Out output of the last safety option in a cascaded chain goes high only
when all axes are below the Safe Speed Limit. In Safe Limited Speed Status Only
mode, each subsequent unit does not enable Safe Limited Speed until the
previous unit has reached the Safe Speed Limit.
Door Monitoring and Enabling Switch Monitoring functions are not allowed in
this mode.
Slave, Safe Limited Speed
Status Only Parameter List
To configure the safety option for Slave, Safe Limited Speed Status Only
monitoring, set these parameters in addition to the Slave, Safe Stop parameters
listed on
and the Slave, Safe Limited Speed parameters listed on
for details on configuring
slave safety options.
TIP
Only the middle and last safety option in a multi-axis system can be configured
for slave modes.
Fil
e
Gr
ou
p
No.
Display Name
Full Name
Description
Values
Re
ad
-Write
Da
ta
T
yp
e
HOST GROUPS
Ge
neral
20
Cascaded Config
Cascaded Configuration
Defines whether the speed monitoring safety option is a single unit or if it occupies a
first, middle, or last position in a multi-axis cascaded system.
Options:
2 = “Multi Mid”
3 = “Multi Last”
RW 8-bit
Integer
21
Safety Mode
Safety Mode
Defines the primary operating mode of the speed monitoring safety functions.
“Slv Spd Stat” (10) - Slave, Safe Limited Speed Status Only
Option:
10 = “Slv Spd Stat”
RW 8-bit
Integer
Limited S
peed
56
Speed Hysteresis
Speed Hysteresis
Provides hysteresis for SLS_Out output when Safe Limited Speed monitoring is active.
0% when P21 [Safety Mode] = 1, 2, 3, 4, 5, 6, 8, or 9
10…100% when P21 [Safety Mode] = 7 or 10
Units:
Default:
Min/Max:
%
0
0 / 100
RW 8-bit
Integer