Rockwell Automation 2094-EN02D-M01-S1 Kinetix 6200 and Kinetix 6500 Safe Speed Monitoring Safety Reference Manual - Manual (Page 30)

30 Rockwell Automation Publication 2094-RM001C-EN-P - May 2013
Chapter 4 Speed Monitoring I/O Signals
When both channels are active, if one channel’s input terminal transitions from
active to inactive and back to active, while the other channel’s input terminal
remains active, both channels must go inactive at the same time before the
evaluated status can return to ON. This condition is called ‘cycle inputs required’.
Figure 3 - Cycle Inputs Required
If inputs are configured with the following dual channel settings, an Input fault
occurs if the inputs are discrepant for longer than 3 seconds or if a ‘cycle inputs
required’ condition exists lor longer than 3 seconds.
• Dual-channel equivalent 3 s
• Dual-channel complementary 3 s
• Dual-channel SS equivalent 3 s
If inputs are configured with one of the following dual channel settings, which
have no limit on the length of time that inputs can be discrepant, an Input fault
does not occur for any discrepant condition or for any ‘cycle inputs required’
condition.
• Dual-channel equivalent
• Dual-channel complementary
For all input settings except Dual-channel SS equivalent 3 s, if one or two
channels are connected to a 24V DC source other than terminals IOD-27 and
IOD-28, a fault occurs.
I/O faults are Stop Category faults that initiate the configured Stop Category.
I/O faults are latched until the drive is successfully reset.
For more information on I/O faults, refer to Troubleshooting the Safe Speed
Monitoring Drive on page 133 .
Channel 0
Active
Inactive
Channel 1
Active
Inactive
Evaluated Status
ON
OFF
Cycle Inputs Required