Appendix A - I/O Signal Descriptions; Plc/ Robot (Cgm) Control Request (O33); Mode Selection (Input Instance 7, Output Instance 0); Shot Number (Input Instance 8, Output Instance 1) - Graco CGM Instructions And Parts

Appendix A – I/O Signal
Descriptions
This section provides details about the CGM Automation
Input and Output Signals.

PLC/ Robot (CGM) Control Request (O33):

This bit must be set (high) before the HFR or NVH will
honor any output request from the PLC, robot or
controlling logic. Furthermore, the controlling logic
needs to provide a dynamic signal to O34 (Heart Beat
from PLC (#)) before requesting control of the HFR or
NVH system (refer to "#" note). A simple logic rung
where the heat beat output from the HFR (I168) is
provided to O34 will satisfy this condition. If the
controlling logic only wants to monitor HFR/ NVH
activity, clear or make O33 low.
Mode Selection (Input Instance 7, Output
Instance 0)
These signals represent the mode of the HFR or NVH
system. The following modes are available:
Mode Mode
Num. Name
1 Disabled
2 Standby
3 Shot
4 Sequence
5 Operator
7 Night
Description
Mode when system is OFF.
System is off and dormant.
Mode for Parking the pumps,
starting circulation (NVH),
opening the Dispense Valve.
Can NOT dispense in this mode.
Mode for dispensing set amount
of material. Up 100 shot recipes
(recipe is a dispense rate ((flow
or pressure)) and amount) are
available.
Mode for dispensing a sequence
of up to 20 shot recipes. Up to
26 sequences can be used and
stored by the HFR/ NVH.
Mode for dispensing at a given
rate, with no pre-calculated
amount.
Mode for recirculating and
conditioning the materials, while
machine not in use. Can NOT
dispense material in this mode.
CGM Interface Manual, HFR/ NVH (Small Map with Data Exchange) Applications, March 25, 2022, Page 10 of 23
Shot Number (Input instance 8, Output
Instance 1):
Shot recipes are typically defined on the ADM shot setup
screen pages. A shot consists of a dispense rate (flow
or pressure) and an amount dispensed (volume, weight
or time). The rate is determined if the machine is in
constant flow or constant pressure modes. The amount
is determined if in volumetric, weight or a time based
amount mode. Both the rate and amount selections are
available on the System #1 setup screen on the ADM.
Sequence and Sequence Positions (Input
Instances 8 & 9, Output Instances 1 & 2):
When in sequence mode, this data element represents
the current (input) or selected (output) position of
sequence of shot recipes. The HFR/ NVH system
provides capability for 26 different sequences (A – Z),
each with up to 20 positions. The sequences can be
defined using the "Sequences" setup screens in the
ADM. Positions in possible 20 positions can be skipped,
and the HFR/ NVH will automatically execute the next
defined position. So for instance, if the controlling PLC
requests Sequence Y (#25) position 1, as illustrated in
figure 11 below, the HFR will execute shot 11 from
position 1, shot 12 from position 2, ... shot 15 from
position 5, and finish the sequence with shot 16 from
position 9 after each dispense request (O29). To
execute the entire sequence, the controlling PLC needs
generated 6 dispense requests when the dispense is to
occur. If the controlling PLC requests a position or
sequence which is NOT defined (for instance, sequence
Y position 7), the un-defined portion of the request will
be ignored.
Figure 11: Typical Sequence Definition screen

System Startup Control (I171, O26)

Setting this bit (O26) will request the following, based on
the figuration of the HFR or NVH system: