Siemens SIMATIC ET 200pro - Changing over Process Variables for the Technology Controller; Switching Units with STARTER

Setting functions
8.7 Application-specific functions
SIMATIC ET 200pro FC-2 converter
Operating Instructions, 04/2015, FW V4.7.3, A5E34257324B AB
143
● p0505 = 3: US units
● p0505 = 4: US units or % relative to US units
Note
Special features
The percentage values for p0505
= 2 and for p0505 = 4 are identical. For internal
calculation and for the output of physical variables, it is, however, important whether the
conversion is made to SI or US units.
In the case of variables for which changeover to % is not possible, the following applies:
p0505
= 1 ≙ p0505 = 2 and p0505 = 3 ≙ p0505 = 4.
In the case of variables whose units are identical in the SI system and US system, and
which can be displayed as a percentage, the following applies:
p0505
= 1 ≙ p0505 = 3 and p0505 = 2 ≙ p0505 = 4.
Parameters affected by changeover
The parameters affected by changing over the unit system are grouped according to unit.
An overview of the unit groups and the possible units can be found in the List Manual in
the Section "Unit group and unit selection".
8.7.2.3
Changing over process variables for the technology controller
Note
We recommend that the units and reference values of the technology
controller are
coordinated and harmonized with one another during commissioning.
Subsequent modification in the reference variable or the unit can result in incorrect
calculations or displays.
Changing over process variables of the technology controller
You change over the process variables of the technology controller using p0595. For
physical values, you define the reference variable in p0596.
The parameters affected by changing over units of the technology controller belong to unit
group 9_1. For details, please refer to the section titled "Unit group and unit choice" in the
List Manual.
8.7.2.4
Switching units with STARTER
Precondition
The inverter must be in the offline mode in order to change over the units.