Emerson SM-I/O 24V Protected, User Manual, Page: 16 / 42

16
SM-I/O 24V Protected User Guide
www.controltechniques.com Issue Number: 2
5 Parameters
5.1 Introduction
The parameters listed in this chapter are used for programming and monitoring the SM-
I/O 24V Protected.
5.1.1 Parameter update times
The SM-IO 24V Protected is an intelligent Solutions Module. The update times for the
parameters are defined by the drive type in use. The following apply only when the
Solutions Module is used with a Unidrive SP:
Parameters shown as "Background" are updated at least once every 30ms.
If a destination pointer parameter is set up to pass data to a drive parameter including
parameters in the menu for this option module, the parameter is updated once every
4ms.
If a source pointer parameter is set up to get data from a drive parameter including
parameters in the menu for this option, the drive parameter is read once every 4ms.
The following apply only when the Solutions Module is used with a Commander SK:
The module has two parameter update times; background and fast update. The actual
update times for the two types of parameter are dependent upon the number of I/O used
(i.e. that are mapped to a valid source or destination) on the module.
The update rate for fast update parameters can be calculated with the following
expression:
t
FU
(ms) = ((Number of I/O used) + 2 ) * 2ms
The update time for background level parameters can be calculated with the following
expression:
t
BU
(ms) = t
FU
* 33
Only source and destination parameters that are routed to a valid parameter are
updated at the fast rate.
Number of I/O source/
destinations active
Fast Update Time (ms) Background Update Time
(ms)
1 6 198
2 8 264
3 10 330
4 12 396
5 14 462
6 16 528
7 18 594
8 20 616
9 22 726
10 24 792