Node Ceramic

WORK IN PROGRESS

PoE node voor the Ceramic Oven based on a PowerNode White. The QR code points to [this] page.

Use

...

Trouble shooting

See PowerNode White for details; or use the MENU button to see a QR code with logging.

"net": "WiFi",
"ip": "192.168.6.91",
"mac": "34:98:7A:70:B0:E4",

The log file is available on http://192.168.6.91/.

One can also telnet to this address. Logs are also sent to MQTT and to Syslog at the firewall. Or connect a USB cable; the use Galvanic USB isolator is wise; but not strictly needed (as it is AC/mains powered).

Configuration

See VK2000-build voor a lot of details.

Somewhat unusual - this node is not fail-safe (i.e. if it crashes/reset - things are switched off); instead one relay is used to latch the safety on; the other relay needs an active pulse to break the interlock and switch things off.

The reason behind this is to not endanger the firing / interfere with the controls/safety of the oven as original designed.

Board jumpers and settings

Board:

1. Rework 1 - half of OPTO resistors replaced by jumpers; 2x68k left in place
2. Current coil - 6k8 burden
3. Relay 1: Normal 5v Songle relay
4. Relay 2: Normal 5v Songle relay
5. AC/DC unit soldered in
6. Fuse soldered in (100 mAmp, slow)

Jumpers:

1. VPOE and VPOE5 both explicit on 'off'
2. 5V power via VINT
3. Vpower via VINT
4. N-jumpers for the Optocouples to get the N from the inputs.

Green Connector

PIN	Description	Use
1	CUR2	NC -- connector too small
2	CUR2	NC -- connector too small
3	CUR1	NC - connector too small
4	CUR1	NC
5	OPTO 2	NC -- N for voltage sense is wired via jumper to pin 10 at back of board
6	OPTO 2	Voltage sense second relay VK2000
7	OPTO 1	NC -- N for voltage sense is wired via jumper to pin 10 at back of board
8	OPTO 1	Voltage sense safety relay coil
9	L input	L AC in (brown)
10	N input	N AC in (blue)
11	Relay 1 NO	Start of safety relay
12	Relay 1 Common	Start of safety relay
13	Relay 2 NO	NC
14	Relay 2 NC	Interlock, for stop
15	Relay 2 common	Interlock, for stop

The heating current goes directly through the coil; we're not making use of the connector. Reason for this is that we're not quite sure of the (starting) currents.

Electrics

Basically a Safety Relay combined ...

Log

{
"manual_poweroff": 0,
"idle_poweroff": 0,
"errors": 0,
"ota": true,
"node": "ceramicsnode",
"machine": "ceramicsnode",
"maxMqtt": 384,
"id": "e4b0707a9834",
"ip": "192.168.6.91",
"net": "WiFi",
"mac": "34:98:7A:70:B0:E4",
"beat": 1707498881,
"alive-uptime": 1500,
"approve": 0,
"deny": 0,
"requests": 0,
"cache_hit": 0,
"cache_miss": 0,
"cache_purge": 0,
"cache_update": 0,
"mqtt_reconnects": 1,
"loop_rate": 15.16720867,
"coreTemp": 40.55555556,
"heap_free": 157356,
"rfid_scans": 0,
"rfid_misses": 27123,
"rfid": "RFID-MFRC522",
"state": "Waiting for card, screen dark",
"seconds_in_state": {
"Booting": 0,
"Out of order": 2,
"Rebooting": 0,
"Transient Error": 0,
"No network": 0,
"Waiting for card": 1203,
"Checking card...": 0,
"Card rejected": 0,
"Switch Fault": 0,
"Waiting for card, screen dark": 583,
"User browsing info pages": 10,
"Powered but idle": 0,
"Firing": 0,
"": 0
},
"WhCounter": 0,
"fw": "ACNode/examples/CeramicsNode/CeramicsNode.ino Feb 9 2024 14:13:36"
}

History

Latest incarnation installed early 2024.