Rockwell Automation 1756-SPESMNRMXT GuardLogix Controllers User Manual - Manuel (Page 75)

Rockwell Automation Publication 1756-UM020I-EN-P - August 2012 75
Add, Configure, Monitor, and Replace CIP Safety I/O Chapter 5
The Network Delay Multiplier can be approximated by the following equation:
[Maximum Observed Network Delay + Margin_Factor]
÷
RPI
Understanding the
Configuration Signature Each safety device has a unique configuration signature, which defines the
module configuration. The configuration signature is composed of an ID
number, date, and time, and is used to verify a module’s configuration.
Configuration via RSLogix 5000 Software
When the I/O module is configured by using RSLogix 5000 software, the
configuration signature is generated automatically. You can view and copy the
configuration signature via the Safety tab on the Module Properties dialog box.
Figure 21 - View and Copy the Configuration Signature
EXAMPLE Calculate the Network Delay Multiplier from Maximum
Observed Network Delay
If:
RPI = 50 ms
Maximum Observed Network Delay = 20 ms
Margin_Factor = 10
Then, the Network Delay Multiplier equals:
[20 + 10]
÷
50 = 60%
Table 19 - Additional Resources
Resource Description
GuardLogix Controllers Systems Safety Reference Manual,
publication
1756-RM093
Provides information on calculating reaction times. Guard I/O DeviceNet Safety Modules User Manual, publication
1791DS-UM001
Guard I/O EtherNet/IP Safety Modules User Manual,
publication
1791ES-UM001