NEC UN552S External Controls - Page 142

28. Emergency Contents This function which plays files in the EMRGENCY CONTENTS folder in the root folder on SD card automatically using MEDIA PLAYER function. During playing, a display prohibits operation except power off. Create "EMERGENCY CONTENTS" folder in a route folder. "Display command" starts playing, and "Delete command" stops playing. 28.1 Emergency Contents Display This command is used in order to display Emergency Contents. 1) The controller requests the monitor to display Emergency Contents. Header SOH-'0'-Monitor ID- '0'-'A'-'0'-'8' Message STX-'C'-'A'-'1'-'F'-'0'-'1'-ETX Check code BCC Delimiter CR Header SOH (01h): Start of Header '0' (30h): Reserved Monitor ID: Specify the Monitor ID of which you want to change a setting. Ex.) If Monitor ID is '1', specify 'A'. '0' (30h): Message sender is the controller. 'A' (41h): Message type is "Command". '0'-'8'(30h, 38h): Message length (8byte) Message STX (02h): Start of Message 'C'-'A'-'1'-'F' (43h, 41h, 31h, 46h): Emergency Contents Command '0'-'1' (30h, 32h): Display ETX (03h): End of Message Check code BCC: Block Check Code Refer to the section 4.3 "Check code" for a BCC calculation. Delimiter CR (0Dh): End of packet 2) The monitor replies Security Enable to the controller. Header SOH-'0'-'0'-Monitor ID- 'B'-'0'-'A' Message STX-'C'-'B'-'1'-'F'-'0'-'1'-ST-ETX Check code Delimiter BCC CR Header SOH (01h): Start of Header '0' (30h): Reserved '0' (30h): Message receiver is the controller. Monitor ID: Indicate a replying Monitor ID. Ex.) When this byte is set to 'A', replying monitor's ID is '1'. 'B' (42h): Message type is "Command reply". '0'-'A'(30h,41h): Message length (10byte) Message STX (02h): Start of Message 'C'-'B'-'1'-'F' (43h, 42h, 31h, 46h): Emergency Contents Reply Command '0'-'1' (30h, 32h): Display ST: Status 00h: No Error 01h: Error ETX (03h): End of Message (142/145)