Loop Data; Dynamic Loop Integer Data - Siemens 353 User Manual

UM353-1B

6.3 LOOP DATA

Loop data is grouped into several categories. When using Modbus, the groupings enable single data requests (up to
60 Words/Registers or 48 Coils) to obtain similar data with a single command. The loop will have different data if
assigned as a controller type (i.e. using the ODC block), a sequencer type (i.e. using the ODS block), an Analog
Indicator Display (i.e. using the ODA block), or a Discrete Indicator Display (i.e. using the ODD block), or
Pushbutton/Switch Operation (i.e. using the ODP block).
a) Dynamic data may change value on each controller scan and/or is not identified as being changed by the data
base change bit (coil). This category of data usually needs to be updated by a workstation every few seconds.
b) Variable data changes periodically. It is usually associated with on-line operation at a workstation but may only
need to be updated on a lower periodic basis or when a data base change is indicated.
c) Static data is similar to variable data but has a lower update requirement. The data may only need updating when
a change is indicated or to verify a previous change made to a parameter.
d) String data contains tag names, units, and messages.

6.3.1 Dynamic Loop Integer Data

Controller [ODC]
Code R/W Description
L#PI R Process
L#SI R/W Setpoint
L#VI R/W Valve (%)
L#XI R X Variable (%)
L#YI R Y Variable (%)
L#RI R/W Ratio
L#BI R/W Bias
L#TlmI R Totalizer - 3 ms (whole) digits
L#TllI R Totalizer - 3 ls (whole) digits
L#PCSW R PCOM Block Status Word (V1.3)
Sequencer [ODS]
Code R/W Description
L#SSNI R Sequencer Step No.
L#SNSI R Sequencer Number of Steps
L#SNGI R Sequencer Number of Groups
L#SLS R/W Sequencer Loop Status
L#SNRI R Sequencer Number of Recipes
L#CRNI R/W Current Recipe Number
L#PCSW R PCOM Block Status Word
L#TACM R Total Active Conditional Msgs
(spare)
..... ..... .....
(spare)
Analog Indicator [ODA]
Code R/W Description
L#P1I R Process 1 (%)
L#P2I R Process 2
L#P3I R Process 3 (%)
L#P4I R Process 4 (%)
April 2012
Range
(%) -3.3 to 103.3 ($0-$0FFF)
(%) -3.3 to 103.3 ($0-$0FFF)
-3.3 to 103.3 ($0-$0FFF)
-3.3 to 103.3 ($0-$0FFF)
-3.3 to 103.3 ($0-$0FFF)
0.00 to 38.40($80-$0F80)
100-0-100 ($80-$0F80)
0-999 ($0000-$03E7)
0-999 ($0000-$03E7)
1-7 ($0001-$0007)
Range
0-250 ($0000-$00FA)
0-250 ($0000-$00FA)
0-16 ($0000-$0010)
(see SLS)
0-9 ($0000-$0009)
0-9 ($0000-$0009)
1-7 ($0001-$0007)
0-64 $0000-$0040)
0 ($0000)
.....
0 ($0000)
Range
-3.3 to 103.3 ($0-$0FFF)
(%) -3.3 to 103.3 ($0-$0FFF)
-3.3 to 103.3 ($0-$0FFF)
-3.3 to 103.3 ($0-$0FFF)
Data Mapping
Register (MB)
40201+10(#-1)
40202+10(#-1)
40203+10(#-1)
40204+10(#-1)
40205+10(#-1)
40206+10(#-1)
40207+10(#-1)
40208+10(#-1)
40209+10(#-1)
40210+10(#-1)
Register (MB)
40201+10(#-1)
40202+10(#-1)
40203+10(#-1)
(see coils)
40204+10(#-1)
40205+10(#-1)
40206+10(#-1)
40207+10(#-1)
40208+10(#-1)
.....
40210+10(#-1)
Register (MB)
40201+10(#-1)
40202+10(#-1)
40203+10(#-1)
40204+10(#-1)
6-5