# PLC And HMI Output Templates

Use these templates to keep answers consistent and implementable.

## PLC Clarifying Questions

Ask only the missing items that matter:

- PLC model/series:
- XDPPro version and firmware:
- Task type: new logic, modification, upload/download, communication, HMI, debugging:
- Connection method: USB, serial, Ethernet, remote:
- Machine state: stopped, running, maintenance, simulation:
- I/O list and device names:
- Safety/interlock requirements:
- HMI variables, alarms, recipes, or communication devices:

## I/O Table

| Type | Address | Name | Device | Normal State | Notes |
|---|---|---|---|---|---|
| Input | X0 | Start PB | Button | OFF | Rising-edge or maintained? |
| Input | X1 | Stop PB | Button | ON/OFF | Confirm wiring logic |
| Output | Y0 | Motor Run | Contactor/Drive | OFF | Include overload permissive |

## Soft-Element Table

| Address | Name | Purpose | Retentive | HMI Visible | Notes |
|---|---|---|---|---|---|
| M0 | Auto mode | Mode latch | No | Yes | Set from HMI/manual switch |
| M10 | Run command | Internal command | No | Yes | Gated by permissives |
| D100 | Set speed | Parameter | Yes | Yes | Unit and range required |

## Ladder Network Plan

Use this format when writing ladder logic in text:

1. Network 1 - Mode and reset
   - Inputs:
   - Logic:
   - Outputs/soft elements:
   - Notes:

2. Network 2 - Permissives and interlocks
   - Inputs:
   - Logic:
   - Outputs/soft elements:
   - Notes:

3. Network 3 - Output control
   - Inputs:
   - Logic:
   - Outputs/soft elements:
   - Notes:

4. Network 4 - Alarms and HMI status
   - Inputs:
   - Logic:
   - Outputs/soft elements:
   - Notes:

## HMI Variable List

| HMI Object | PLC Address | Data Type | Access | Display/Input Range | Notes |
|---|---|---|---|---|---|
| Run status lamp | M10 | Bit | Read | ON/OFF | Green when running |
| Speed setting | D100 | Word | Read/Write | 0-3000 rpm | Add bounds check |
| Alarm code | D200 | Word | Read | 0-999 | Map to alarm text |

## Alarm Table

| Alarm No. | Trigger | Message | Reset Condition | Stop Level | HMI Address |
|---|---|---|---|---|---|
| 1 | X10 OFF | Emergency stop active | E-stop reset and reset PB | Immediate stop | M200 |
| 2 | M301 ON | Servo fault | Servo reset complete | Controlled stop | M201 |

## Debug Record

| Step | Check Item | Expected | Actual | Result | Notes |
|---|---|---|---|---|---|
| 1 | PLC connection | Online |  |  | USB/serial/Ethernet |
| 2 | Inputs monitor | Matches field devices |  |  | Test one by one |
| 3 | Outputs manual test | Safe action |  |  | One output at a time |
| 4 | Auto sequence dry-run | Correct order |  |  | No product/load |