RELAY CONTROL CODES for K74
Send Hex code to control relays 1-8
Note that in this application, Relays 7 and 8 switch together to determine
polarity of DC voltage.
Colored cells represent codes to move only one motor, forward or reverse.
| Motor forward | Motor Reverse | |||||||||||||||||||
| Dec | Hex | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | Dec | Hex | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 192 | C0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 193 | C1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | |
| 2 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 194 | C2 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | |
| 3 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 195 | C3 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | |
| 4 | 4 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 196 | C4 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | |
| 5 | 5 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 197 | C5 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | |
| 6 | 6 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 198 | C6 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | |
| 7 | 7 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 199 | C7 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | |
| 8 | 8 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 200 | C8 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | |
| 9 | 9 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 201 | C9 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | |
| 10 | A | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 202 | CA | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | |
| 11 | B | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 203 | CB | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | |
| 12 | C | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 204 | CC | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | |
| 13 | D | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 205 | CD | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | |
| 14 | E | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 206 | CE | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 0 | |
| 15 | F | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 207 | CF | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | |
| 16 | 10 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 208 | D0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | |
| 17 | 11 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 209 | D1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | |
| 18 | 12 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 210 | D2 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | |
| 19 | 13 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 211 | D3 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 1 | |
| 20 | 14 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 212 | D4 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | |
| 21 | 15 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 213 | D5 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 1 | |
| 22 | 16 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 214 | D6 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 0 | |
| 23 | 17 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 215 | D7 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | 1 | |
| 24 | 18 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 216 | D8 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 0 | |
| 25 | 19 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 217 | D9 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 1 | |
| 26 | 1A | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 218 | DA | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | |
| 27 | 1B | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 219 | DB | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | |
| 28 | 1C | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 220 | DC | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | |
| 29 | 1D | 0 | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 221 | DD | 1 | 1 | 0 | 1 | 1 | 1 | 0 | 1 | |
| 30 | 1E | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 222 | DE | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 0 | |
| 31 | 1F | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 223 | DF | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | |
| 32 | 20 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 224 | E0 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | |
| 33 | 21 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 225 | E1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | |
| 34 | 22 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 226 | E2 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | |
| 35 | 23 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 227 | E3 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | |
| 36 | 24 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 228 | E4 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | |
| 37 | 25 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 1 | 229 | E5 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | |
| 38 | 26 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 230 | E6 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | |
| 39 | 27 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 231 | E7 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | |
| 40 | 28 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 232 | E8 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | |
| 41 | 29 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 233 | E9 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | |
| 42 | 2A | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 234 | EA | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | |
| 43 | 2B | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | 235 | EB | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 1 | |
| 44 | 2C | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 0 | 236 | EC | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | |
| 45 | 2D | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 237 | ED | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | |
| 46 | 2E | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 0 | 238 | EE | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 0 | |
| 47 | 2F | 0 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 239 | EF | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | |
| 48 | 30 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 240 | F0 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | |
| 49 | 31 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 1 | 241 | F1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 1 | |
| 50 | 32 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 242 | F2 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 0 | |
| 51 | 33 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 243 | F3 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | 1 | |
| 52 | 34 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 244 | F4 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | |
| 53 | 35 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 1 | 245 | F5 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | |
| 54 | 36 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0 | 246 | F6 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 0 | |
| 55 | 37 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 1 | 247 | F7 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | |
| 56 | 38 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 0 | 248 | F8 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | |
| 57 | 39 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 1 | 249 | F9 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 1 | |
| 58 | 3A | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 0 | 250 | FA | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 0 | |
| 59 | 3B | 0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 | 251 | FB | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | |
| 60 | 3C | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 0 | 252 | FC | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | |
| 61 | 3D | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 253 | FD | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | |
| 62 | 3E | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 254 | FE | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | |
| 63 | 3F | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 255 | FF | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |