TRDP
According IEC61375-2-3:2015
Sink/Subscriber (relay control)
Pattern: PD Push Pattern UDP port: 20548
TRDP payload following header:
| Byte Offset | Bytes | Variable | Details |
|---|---|---|---|
| 0x0 | 1 | desired_relay_state |
Bit0: Relay1 Bit1: Relay2 Bit==0: turn relay off Bit==1: turn relay on |
| 0x1 | 3 | padding |
Publisher/Source (input publishing)
Pattern: PD Push Pattern UDP port: 20548 Rate: configurable 5 Hz … 0.1 Hz
TRDP payload following header:
| Byte Offset | Bytes | Variable | Details |
|---|---|---|---|
| 0x0 | 4 | ana1 |
big endian, IEEE 754 Range ~ -1.2 to +1.2 1.0 = +10 V at Vin 1.0 = +20 mA at Iin |
| 0x4 | 4 | ana2 |
As ana1 |
| 0x8 | 1 | digin |
Bit0: IN1 Bit1: IN2 Bit2: IN3 Bit3: IN4 Bit==0: Input low Bit==1: Input high |
| 0x9 | 1 | relay |
Readback of desired relay state (cannot detect relay faults) Bit0: Relay1 Bit1: Relay2 Bit==0: relay off Bit==1: relay on |
| 0xa | 2 | padding |