Graco PrecisionSwirl Instructions-Parts List Manual page 138

Appendix C - Communications Gateway Module (CGM) Connection Details
CGM Command Interface
NOTE: The CGM command interface is only available
for fluid plates with 16 or 256 styles.
NOTE: Some data instances are offered directly on the
map and through the command interface. It is
recommended that you use the data available directly to
improve communication speed.
The CGM command interface utilizes bits in the CGM
I/O Data Map, page 131, to support many additional
functions that are not available in the other CGM I/O
bits.
NOTE: When changes are made over the command
interface, the ADM screen may not update immediately.
it may be necessary to navigate away from the screen
then back to it.
The CGM command interface uses automation output
bits 256 to 327. These bits can be used to request the
value of a current system setting (read) or change a
system setting (write).
• Output bits 256-267 are used to identify the
individual command. Each bit will have a single
binary value to create the hex code listed in the
commands table.
• Output bits 268-275 are used to identify the
individual Fluid Plate or Swirl dispenser to which the
commands will apply.
• Output bits 288-319 are used to identify the value of
the command specified by bits 256-267 and
268-275.
• Output bit 321 identifies the command as a write
command.
• Output bit 320 identifies the command as a read
command.
The CGM command interface uses automation input
bits 128-159 to read the current system values. It also
uses input bits 160-163 to identify the status of
commands:
• Bit 160: Command Active
• Bit 161: Command Success
• Bit 162: Command Failure
• Bit 163: Value Coerced
NOTE: If both output bits 320 (read) and 321 (write) are
high during a command the result will be a command
failure identified by input bit 162 (command failure)
going high.
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Examples
NOTE: See the timing diagram and tables starting on
page 139 for detailed descriptions of the input and
output bits.
Example 1: if output bits 256-275 are 0xB0203, output
bits 288-319 are 0x0004, and output bit 321 is high, this
means:
• The command relates to the purge period in
minutes (0x__203)
• The command relates to fluid plate 1 (0xB0___)
• The command is a write command (bit 321 high)
• The value of the command is 4 (0x0004)
Combine these individual pieces to understand the
command as a whole: Change the purge period setting
on fluid plate 1 to 4 minutes.
Example 2: if output bits 256-275 are 0xB3212, input
bits 288-319 are 0x0000, and output bit 320 is high, this
means:
• The command relates to whether valve 1 is
enabled (0x__212)
• The command relates to fluid plate 4 (0xB3___)
• The command is a read command (bit 320 high)
• The value of the command is 0 (0x0000)
Combined, this means: Valve 1 on fluid plate 4 is
disabled.
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