ProMix 2KS Integration Specifics
Digital Inputs
See Automation Flow Charts, pages 55-59.
Mix Start: This is a maintained input. When High, the ProMix 2KS will attempt to enter Mix mode. This Mix Start input should not be attempted unless the Mix_Ready output is recognized. This ensures that there are no alarms and that the Mix Start input is appro- priate.
This input stays High at all times when mixing on demand is required. When Low, the intent is to stop mix- ing material and perform a purge or recipe change.
Do not toggle this input to set the unit to Standby mode during short work stoppages. The ProMix 2KS will auto- matically go into Idle mode after 2 minutes of inactivity. When a Gun Trigger input is seen, the ProMix 2KS will automatically leave Idle mode and resume mixing mate- rial where it left off.
Purge Start: This is a maintained input. When recog- nized by the ProMix 2KS, the Purge Sequence will start, using the Purge Time from the active recipe. This will also include the Solvent Fill Time. Proper monitoring of the Purge/Color Change Output is required to ensure this function has begun. Once this output is removed, the system will immediately go to Standby mode.
Color Change Start: This is a momentary input, 100 msec minimum. When recognized by the ProMix 2KS, the Color Change sequence will begin, starting at the Color/Catalyst Dump.
NOTE: If the new recipe has the same color as the active recipe, then the Color/Catalyst Dump and Color/Catalyst Fill times are skipped and the Color Change Sequence starts with the Purge. Also, the rec- ipe bit configuration for the Color Change must be loaded at least 100 msec before the Color Change Start input is turned on. The recipe bit configuration must remain on while the Color Change Start input is removed. Graco recommends the recipe bits stay active and do not change until a new color is required. The PLC should monitor the Purge/Color Change Output as well as the Fill Active Output to ensure the process hap- pens as required. A complete color change without errors (resulting in a Mix Ready Output state) is a com- pleted color change.
NOTE: This also applies if using the Modbus Registers (see the Modbus Map table in manual 312785).
Gun Trigger: When High, this input signals the ProMix 2KS that the gun is actually triggered. It should be sent every time the gun is triggered. This input provides tim- ing for alarm functions and also drives the flow control functions. Without it, no flow control functions will start.
Job Complete: This is a momentary input, 100 msec minimum. When recognized by the ProMix 2KS, the Job totals are cleared and a time/date stamp is added for retrieval.
Remote Stop: Use this input when external equipment is used to stop the system. Clear any alarms before using this input. For more information about when this input is needed, contact your Graco distributor.
Alarm Reset: This is a momentary input, 100 msec minimum. When recognized by the ProMix 2KS it clears any active alarms and allows the automation to take the next step.
Common: This is not an input, but the ProMix 2KS expects to have the COM side of the 24 Vdc supply con- nected as shown in Table 8. This ensures proper opera- tion of each input and output.
I/O Terminal Strip Detail
Pin 1 | RS485 Integration A |
|
| RS485 Integration B |
|
| RS485 Integration Ground | |
| RS485 Network A |
|
| RS485 Network B |
|
| RS485 Network Ground |
|
Pin 1 | Flow Control Calibrate |
|
| Gun Trigger |
|
| Digital Common | INPUTS |
| Remote Stop |
|
| Alarm Reset |
|
| General Alarm |
|
| Digital Common | OUTPUTS |
| Potlife Alarm |
|
| Flow Rate Analog In |
|
| Flow Rate Analog Common | |
|
| TI12958a |
FIG. 63: EasyKey Terminal Strips
52 | 312779E |
