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