Graco 24J415 Instructions - Parts Manual page 28

Available Internal Data
Data
Byte Bit Type
12,
13, Double
14, Integer
15
16,
17, Double
18, Integer
19
20 Byte
21 Byte
22, 23 Integer
24, 25 Integer
28
State or
Range PLC Outputs to CGM Inputs for PLC Control Description
Change Flow Rate or Pressure Set Point: Changes the flow or pressure set point if in
operator mode, or the flow or pressure set point for the selected shot number if in shot
mode. The set point change is either pressure or flow depending if the HFR is configured to
constant pressure or flow mode.
The PLC value to the CGM is an integer and must be multiplied by 1000 for the requested
flow rate to be in system units.
Example: Flow Rate desired is 17.125 cc/sec. Send double word 14 = 17125 (unit chosen is
cc/sec)
Change Dispense Amount Set Point: Changes the current shot selected to a new dispense
amount (shot size). The value sent to the CGM must be an integer. Units depend on what is
chosen in the system setup.
The PLC value to the CGM is an integer and must be multiplied by 1000 for the requested
flow rate to be in system units.
Example: Dispense Amount desired is 150 grams. Send double word 18 = 150000 (unit
chosen is grams)
Not Used
N/A
Not Used
N/A
Change the Temperature Set Point: Changes zone selected to a temperature in °C. The
value sent to the CGM must be an integer. Units are °C regardless of the units chosen in
the system setup. Note the temperature set points are limited by the temperature high and
low alarm values. The alarm set points must be greater than 10 degrees from the requested
set point. If the alarm is closer than 10 degrees the requested set point will be ignored. Note
these bytes are combined with bytes 24,25 (zone to change).
The PLC value is xx.x and must be multiplied by 10 prior to being sent to the CGM. The
value must be in °C.
Example: Change Red Hose Temperature to 102°F. Send 238 (23.8°C) to the CGM along
with the zone (see bytes 24,25)
Change the Temperature zone: Changes zone in which the temperature set point will be
changed. Note these bytes are combined with bytes 22,23 (temperature to change).
When changing a heat zone, select the appropriate zone number which will enable the
CGM to write a new temperature set point to the heat zone selected. Only 1 heat zone can
be selected at a time. Bytes 24,25 (MSW) + 22,23 (LSW) are combined to form a double
word from the PLC output to CGM input.
0 = Red Tank Heater
1 = Blue Tank Heater
2 = Red Inline Heater
3 = Blue Inline Heater
4 = Red Hose Heater
5 = Blue Hose Heater
6 = Red Chiller
7 = Blue Chiller
Example: Change Red Hose Temperature to 102°F. Send integer "4" to word 24 and
combine with integer "238" in word 22 (23.8°C) to the CGM (see bytes 22,23).
3A1704N