Setup 3
Function
Abbrev.
Function Address
Sequential Display
Master Unit Control | MC | 00h | (0) | UO=00 |
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Master Unit Digital I/O | MD | 40h | (64) | U1=40 |
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Master Unit Analog I/O | MA | 80h | (128) | U2=80 |
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The OFFSET addressing mode is more convenient to use as only one address setup is required for each network connection. For example changing the master unit control MC, from 00h to 03h will automatically cause MD=43h; MA=83h.
Variable Mode
In the variable mode function addresses are independent of each other and can range from 00h to Ffh. For this mode, each function, MC, MD, and MA must be entered. As long as addresses are not duplicated, they can take on any of the 256 possibilities. The variable mode must be used with some software packages and systems of more than 64 BASIC I/O AD network connections.
The loading of selected function addresses into the BASIC I/O AD is explained after the description of analog / digital separator, baud rates, and protocol handshake type.
Analog/ Digital separator:
Each BASIC I/O AD will require an analog/ digital separator to be set. This identifies which modules are analog and which are digital. This is necessary so that the system can properly direct each instruction to the appropriate module.
The analog/ digital separator is the character following the 9 in the sequential display. It should be set equal to he HEX value of the lowest numbered module position containing a digital module (input or output). If this BASIC I/O AD contains only analog modules, set this value to G. Refer to the worksheet .