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180 • Appendices DMC-3425
For example, if blocks 2 and 3 are to be outputs, then n is 3 and the command, CO3, should be issued.
Note: This calculation is identical to the formula: n = n
2
+ 2*n
3
+ 4*n
4
+ 8*n
5
+16* n
6
+32* n
7
+64* n
8
+128* n
9
where n
x
represents the block.
Saving the State of the Outputs in Non-Volatile Memory
The configuration of the extended I/O and the state of the outputs can be stored in the EEPROM with
the BN command. If no value has been set, the default of CO 0 is used (all blocks are inputs).
Accessing extended I/O
When configured as an output, each I/O point may be defined with the SBn and CBn commands
(where n=1 through 8 and 17 through 80). Outputs may also be defined with the conditional
command, OBn (where n=1 through 8 and 17 through 80).
The command, OP, may also be used to set output bits, specified as blocks of data. The OP command
accepts 5 parameters. The first parameter sets the values of the main output port of the controller
(Outputs 1-8, block 0). The additional parameters set the value of the extended I/O as outlined:
OP m,a,b,c,d
where m is the decimal representation of the bits 1-8 (values from 0 to 255) and a,b,c,d represent the
extended I/O in consecutive groups of 16 bits. (values from 0 to 65535). Arguments that are given for
I/O points configured as inputs will be ignored. The following table describes the arguments used to
set the state of outputs.
Argument Blocks Bits Description
M 0 1-8 General Outputs
A 2,3 17-32 Extended I/O
B 4,5 33-48 Extended I/O
C 6,7 49-64 Extended I/O
D 8,9 65-80 Extended I/O