6.3. System Design of Hopper Scale
6.3.1.Operation and I/O Design
In General, looking an old type hopper scale design, the simplest indicator only displayed weighing value, other system devices communicated the control signal with each I/O interface. And the key operation and monitoring the system separately were controlled.
The indicator
The indicator is designed so as to be able to select arbitrary keys and terminals to control the system form front panel keys and the I/O interface with the menu function. And the function of keys and terminals can be designed in the same way.
The system information of
6.3.2. | Design Example |
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Suppose that the I/O, keys and |
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Supply start: | F1 key, | [0thf- 2] [6] | ||
Emergency stop key: | F2 key, | [0thf- 3] [13] | ||
Dribble signal (low power): | terminal B1, | [0utf- 1] [6] | ||
Batch finish signal (low power): | terminal B2, | [0utf- 2] [14] | ||
Not used recipe code at "Not used recipe sequence" | [5q f- 8] | [0] | ||
Use default setting about |
| [5ub f 1] | [0] | |
Setup
Step | 1 | Enter the function list. |
Step | 2 | Select the menu F1 key.([Function] - [Function setting] - [General] - [Other] - [F1 key]) |
Step | 3 | Select [6] of Batch start at F1 key and store it. |
Step | 4 | Select [13] of Forced batch finish at F2 key and store it. |
Step | 6 | Select the menu terminal B1. |
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| ([Function] - [Function setting] - [Control I/O Function] - [Output] - [OUT (B1)]) |
Step | 8 | Select [6] of Dribble flow at terminal B1 and store it. |
Step | 9 | Select [14] of Batch finish at terminal B2 and store it. |
Step 10 | Set [6] of "Not used recipe code" at Recipe sequence. | |
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| ([Function] - [Function setting] - [Sequence] - [Basic] - [Recipe mode]) |
Step 11 | Select [0] of the default menu in the and store it. | |
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| ([Function] - [Function setting] - [General] - |
Step 12 | Press the ESC key several times to return to the weinghing mode. | |
Operation and Response
When the F1 key is pressed, a batch weighing is started and terminal B1 works. When the F2 key is pressed, batch weighing is stopped.
When the target weight is got, terminal B2 is turned on.
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