GMC-P7-F8 Manual Batching Controller
Quick specs
| I/O & Performance | |
|---|---|
| Inputs | 5 digital inputs, opto-isolated, low-level effective |
| Outputs | 9 digital outputs, open-collector |
| Communication | 3 serial ports (2× RS-485 standard), MODBUS-RTU / MODBUS-ASCII / Cont-A / Cont-B / r-Cont / rE-Cont / YH / Print; optional Ethernet expansion (MODBUS-TCP); USB for software update |
| A/D speed | 24-bit Sigma-Delta, 50 – 960 conversions per second (10 selectable sampling rates) |
| Resolution | 1 / 100,000 (max display); input sensitivity 0.02 µV/d |
| Connection | |
| Display | 7-inch touch screen, English |
| Load cell excitation | DC 5 V, 125 mA max (supports 6-wire load cells) |
| Physical & Environment | |
| Power supply | DC 24 V, ~15 W |
| Operating temperature | -10 ℃ to +40 ℃ |
| Operating humidity | ≤90% RH, non-condensing |
| Enclosure | Panel-mount; cut-out 214 × 148 mm (±1 mm tolerance), fixed via M4×12 screws on side plates |
| Dimensions | 233 × 168 × 63 mm (W × H × D); product weight 1,542 g |
Applications
- Operator-guided recipe batching
- Food ingredient dosing
- Chemical and pharmaceutical batching
- Small-batch production weighing
OEM & ODM ready
Built for integration into your line, your machine, or your brand.
As General Measure’s South African partner, R&D Weighing supports OEM and ODM engagements across the controller range. From private-label badging through to custom enclosures, communication protocols, and full system integration with your existing PLC, MES, or ERP environment.
- Private-label finishing & branding
- Custom enclosure & mounting options
- PLC / MES / ERP integration
- Bespoke communication / protocol configurations
- Multi-line synchronisation
- Engineering support throughout commissioning
The manual batching controller GMC-P7-F8 guides an operator through a sequenced multi-material recipe: coarse and fine cut-off targets per ingredient, over- and under-tolerance bands, and on-screen prompts to confirm each material before the controller moves to the next. The F8 stores 10 recipe groups, each with up to 20 materials, making it a fit for chemical compounding, feed and pet-food premixes, concrete and mortar mix stations, fertiliser and seed blends, and any plant where a few materials need to be dispensed by an operator against a written formula. The display shows the live ingredient weight and tolerance band so the operator knows exactly when to stop pouring.
Operator-confirmed sequencing for multi-material recipes
Each recipe in the GMC-P7-F8 can hold up to 20 materials, each with its own target, upper and lower tolerance band, and optional auto-tare between materials. The operator hits Start, the controller prompts for material 1, the operator pours until the live weight enters the tolerance band, and the F8 logs the actual weight against the target. Done advances to material 2. After the final material the controller writes a batch record (recipe name, target vs actual per ingredient, gross / net / cumulative weight, operator ID, start and end timestamps, and total batch duration) which can be printed on a ticket printer or pulled over Modbus by a supervisory PLC.
Communication, traceability and integration
The F8 carries three serial ports with full protocol flexibility: Modbus-RTU, Modbus-ASCII, Cont-A, Cont-B, r-Cont, rE-Cont, YH and Print, plus an optional Ethernet expansion board for Modbus TCP. That gives a recipe management system, batch-tracking software like Skyris, or a plant PLC several routes into the controller. USB is used for software updates and recipe import/export. Every batch is logged to internal history with timestamps, so even sites that don't run a supervisory system have a record of each batch on the controller itself.
Frequently asked questions
What is the difference between manual batching and automatic batching?
Automatic batching uses motor-driven gates, screws or pumps to dispense each material without operator intervention (the GM9907-LB does this for up to 12 silos). Manual batching with the GMC-P7-F8 keeps the operator in the loop. The controller sequences the recipe and watches the weight, the operator pours each material and confirms before moving to the next. Choose the F8 where ingredient handling is too variable, too small-batch or too occasional to justify motorised dosing gear.
How many recipes and materials can the GMC-P7-F8 store?
The F8 stores 10 recipe groups, each with up to 20 materials. Each material in a recipe has its own target, upper limit and lower limit, plus an optional auto-tare-before-each-material setting. That covers everything from a 3-ingredient mortar mix to a 20-ingredient feed premix on the same controller.
Can the GMC-P7-F8 connect to a plant PLC or recipe management software?
Yes. The F8 has three serial ports with Modbus-RTU and Modbus-ASCII protocols and an optional Ethernet expansion board for Modbus-TCP. A plant PLC, a SCADA system or Skyris batch-management software can read the live recipe state, batch history and per-material totals, and can also push recipes down to the controller over Modbus.
