Galil DMC-1800 Manual De Usuario
220 • Appendices
DMC-1700/1800
CO n
Where, n is a decimal value, which represents a binary number. Each bit of the binary number represents one block
of extended I/O. When set to 1, the corresponding block is configured as an output.
of extended I/O. When set to 1, the corresponding block is configured as an output.
The least significant bit represents block 2 and the most significant bit represents block 9. The decimal value can be
calculated by the following formula. n = n
calculated by the following 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. If the n
x
value is a one, then the block of 8 I/O points is to be configured as an output. If the n
x
value is a zero, then the block of 8 I/O points will be configured as an input. For example, if block 4 and 5 is to be
configured as an output, CO 12 is issued.
configured as an output, CO 12 is issued.
8-Bit I/O Block
Block
Binary Representation
Decimal Value for Block
17-24 2
2
0
1
25-32 3
2
1
2
33-40 4
2
2
4
41-48 5
2
3
8
49-56 6
2
4
16
57-64 7
2
5
32
65-72 8
2
6
64
73-80 9
2
7
128
The simplest method for determining n:
Step 1. Determine which 8-bit I/O blocks to be configured as outputs.
Step 2. From the table, determine the decimal value for each I/O block to be set as an output.
Step 3. Add up all of the values determined in step 2. This is the value to be used for n.
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
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).
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).
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:
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 which are given for I/O points
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 which are given for I/O points
which are
configured as inputs will be ignored. The following table describes the arguments used to set the state of outputs.