Graco InvisiPac HM10 Instructions Manual page 52

Communications Gateway Module (CGM)
NOTE: On an HM10 without the 4 channel unlock token present, the system will enable the first two channel
requests, and will ignore the remaining. For example, if a request was presented for channels 1, 3, and 4, only
channels 1 and 3 would be enabled.
Temperature Setpoint Adjustment: Adjusting a temperature setpoint is accomplished by specifying the zone to
adjust, the new setpoint, and finally setting a bit to accept the new data. The new temperature is to be specified
using whole numbers presented in the operating units selected on the InvisiPac (verify by checking the units bit).
F . 51
IG
NOTE: The setpoint is always specified in a single digit format, and is assigned to the specified zone enumeration.
Setpoint feedback is bitpacked for each channel, while the melter is a singular number. Each setpoint is presented
as a 16 bit number – The hose is contained in bits 31-16, the gun is contained in bits 15-0.
When strobing a new setpoint, the InvisiPac will verify it is in range before accepting the request. Tag IDs 36 & 37
will indicate that the setpoint was either accepted or rejected. As shown above, the first 3 requests are accepted,
while the last uses a temperature setpoint that is greater than the maximum allowable setpoint of 400F. In this
condition, the InvisiPac raises the rejected bit. Note that the accepted/rejected bits are both set to 0 whenever
parameters that affect a setpoint request change (zone to modify, new setpoint, a user changing the temperature on
the screen after the CGM sent a request).
Operating Unit Selection: Operating units are specified as individual bits, where 0 represents metric, and 1
represents US units. The example below shows moving all units from Metric to US. When strobing units, be sure to
specify all three units together: Temperature, Weight, and Distance. On the Strobe's rising edge, the new units will
be selected.
F . 52
IG
52 3A7259C