GE GFK0579B user manual 131

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:

Hno more I/O modules than can be included in the Remote I/O Scanner's I/O map; or

Hany 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

Hany number of discrete modules plus up to 41 analog output modules, with at least one option module in the remote drop; or

Hup 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 ªConfiguration File is Invalidº. 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.

Description	Number	Multiplyby	=
	of Each	BytesEach	Contribution
Numberof I/O Data Types		36
(%I, %AI, %Q, %AQ)
Discrete Input Modules, MDL2nn		36
Discrete Input Modules, MDL6nn		42
Discrete Output Modules		38
AnalogInputModules		150
AnalogExpanderModules		22
AnalogOutputModules		86
RemoteI/OScanner	1	50	50
				a Must be
		Total
				4500 or less.

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.

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