NEC X461UN P401 : RS232 codes for X461UN, X461HB, X431BT, P401, P461, P521, P5 - Page 5

Message format of the "Set parameter" is as follows, STX OP code OP code page Set Value ETX Hi Lo Hi Lo MSB LSB  Refer to section 5.3 "Set parameter" for more details. 4 Set Parameter reply The monitor replies with this message for a confirmation of the "Set parameter message". Message format of the "Set parameter reply" is as follows, STX Result OP code page OP code Type Max value Requested setting Value ETX Hi Lo Hi Lo Hi Lo Hi Lo MSB LSB MSB LSB  Refer to section 5.4 "Set parameter reply" for more details. 5 Command "Command message" format depends on each command. Usually, this "command message" is used for some non-slider controls and some special operations, such as "Save current settings", "Get timing report", "power control", "Schedule", etc. Refer to section 5.5 "Commands message" for more details. 6 Command reply The monitor replies to a query from the controller. "Command reply message" format depends on each command. Refer to section 5.5 "Commands message" for more details. 4.5 Check code Header Message Check code Delimiter Check code is the Block Check Code (BCC) between the Header and the End of Message except SOH. SOH Reserved Destination Source Type Length(H) Length(L) STX Data | | ETX Check code 27 26 25 24 23 22 21 20 D0 D1 D2 D3 D4 D5 D6 D7 D8 | | Dn Dn+1 P P P P P P P P Dn+1 = D1 XOR D2 XOR D3 XOR ,,, Dn XOR: Exclusive OR (5/50)