GE GFK0579B Scanner User Manual


 
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Appendix B Finding the I/O Configuration Data Total
for a Remote Drop
The maximum amount of I/O configuration data for a remote drop is 4500 bytes. This
amount will accommodate the configuration of a remote drop with:
no more I/O modules than can be included in the Remote I/O Scanner’s I/O map;
or
any number of discrete modules plus up to 16 analog modules (input and/or
output), with at least one option module (PCM, GDS, or ADS) in the remote drop;
or
any number of discrete modules plus up to 41 analog output modules, with at least
one option module in the remote drop; or
up to 29 analog modules (combination of input and output modules) with no
discrete modules.
If a planned remote drop is not within these maximums, you will need to estimate its
configuration data total to be sure it does not exceed 4500 bytes. Attempting to store a
larger I/O configuration to a Remote I/O Scanner will cause Logicmaster 90–70 to
generate the message “Configuration File is Invalid”. The configuration will not be
accepted. The module will not operate properly until a valid configuration has been
stored to it.
If you need to find the I/O configuration data total, follow the steps below. You can use
this table as a guide. Two examples are shown on the next page.
Number of I/O Data Types 36
(%I, %AI, %Q, %AQ)
Discrete Input Modules, MDL2nn 36
Discrete Input Modules, MDL6nn 42
Discrete Output Modules 38
Analog Input Modules 150
Analog Expander Modules 22
Analog Output Modules 86
Remote I/O Scanner 1 50 50
Description
Number
of Each
Multiply by
Bytes Each
=
Contribution
Total
Must be
4500 or les
s.
1. For each data type (%I, %AI, %Q, %AQ) configured for the Remote I/O Scanner,
add 36 bytes to the total. For example, if all four data types are configured, add
144.