When you issue CROB command via WritePoint or Action, the driver requires:

• data_type=UInt8
• value is a u8 Control Code (DNP3 Group12Var1 ControlCode)

However, not all u8 from 0..=255 are accepted by the gateway: To avoid ambiguity/malfunction, the gateway only supports a clear safe subset (See full table below).

1. Bitfield Definition

Driver encoding/decoding of CROB ControlCode follows this bitfield:

• bits 7..6: Trip/Close Code (TCC)
  • 0b00 → Nul
  • 0b01 → Close
  • 0b10 → Trip
  • 0b11 → Reserved (Gateway Rejects)
• bit 5: clear
• bit 4: queue (Obsolete in standard, but still representable; device support depends on Outstation)
• bits 3..0: OpType
  • 1 → PulseOn
  • 2 → PulseOff
  • 3 → LatchOn
  • 4 → LatchOff
  • 0/5..15 (Gateway Rejects)

2. Most Common 4 Values

If you don't need Trip/Close, nor queue/clear (Most common in field), then:

• PulseOn → 1 (0x01)
• PulseOff → 2 (0x02)
• LatchOn → 3 (0x03)
• LatchOff → 4 (0x04)

3. Gateway Allowed Full ControlCode(u8) List

u8(dec)	u8(hex)	OpType	TCC	queue	clear
1	0x01	PulseOn	Nul	false	false
2	0x02	PulseOff	Nul	false	false
3	0x03	LatchOn	Nul	false	false
4	0x04	LatchOff	Nul	false	false
17	0x11	PulseOn	Nul	true	false
18	0x12	PulseOff	Nul	true	false
19	0x13	LatchOn	Nul	true	false
20	0x14	LatchOff	Nul	true	false
33	0x21	PulseOn	Nul	false	true
34	0x22	PulseOff	Nul	false	true
35	0x23	LatchOn	Nul	false	true
36	0x24	LatchOff	Nul	false	true
49	0x31	PulseOn	Nul	true	true
50	0x32	PulseOff	Nul	true	true
51	0x33	LatchOn	Nul	true	true
52	0x34	LatchOff	Nul	true	true
65	0x41	PulseOn	Close	false	false
66	0x42	PulseOff	Close	false	false
67	0x43	LatchOn	Close	false	false
68	0x44	LatchOff	Close	false	false
81	0x51	PulseOn	Close	true	false
82	0x52	PulseOff	Close	true	false
83	0x53	LatchOn	Close	true	false
84	0x54	LatchOff	Close	true	false
97	0x61	PulseOn	Close	false	true
98	0x62	PulseOff	Close	false	true
99	0x63	LatchOn	Close	false	true
100	0x64	LatchOff	Close	false	true
113	0x71	PulseOn	Close	true	true
114	0x72	PulseOff	Close	true	true
115	0x73	LatchOn	Close	true	true
116	0x74	LatchOff	Close	true	true
129	0x81	PulseOn	Trip	false	false
130	0x82	PulseOff	Trip	false	false
131	0x83	LatchOn	Trip	false	false
132	0x84	LatchOff	Trip	false	false
145	0x91	PulseOn	Trip	true	false
146	0x92	PulseOff	Trip	true	false
147	0x93	LatchOn	Trip	true	false
148	0x94	LatchOff	Trip	true	false
161	0xA1	PulseOn	Trip	false	true
162	0xA2	PulseOff	Trip	false	true
163	0xA3	LatchOn	Trip	false	true
164	0xA4	LatchOff	Trip	false	true
177	0xB1	PulseOn	Trip	true	true
178	0xB2	PulseOff	Trip	true	true
179	0xB3	LatchOn	Trip	true	true
180	0xB4	LatchOff	Trip	true	true

4. How to use WritePoint / Action?

4.1 WritePoint (BinaryOutput Write Point)

• point.group=BinaryOutput
• point.data_type=UInt8
• value: Fill in u8(dec) from the table on this page

Note

WritePoint path CANNOT control crobCount/crobOnTimeMs/crobOffTimeMs (Driver intentionally does not expose these protocol level fields). If you need to configure counts/pulse timing, please use Action path.

4.2 Action (CROB Batch Control)

• Action.inputs[].driver_config.group=CROB
• Action.inputs[].driver_config.index=<Target Index>
• Action.inputs[].data_type=UInt8
• Action.inputs[].value: Fill in u8(dec) from the table on this page
• crobCount/crobOnTimeMs/crobOffTimeMs: Configured via Parameter Level Modeling Fields

Note

If the value you pass is not in the 48 values in the table above (e.g., op_type=0 or tcc=Reserved), the driver will directly reject and return an error.