TASCAM CD-A750 RS-232C Specification - Page 8

TASCAM CD-A750 RS-232C Protocol Specifications Command sequence In most cases the controlled device will not send an ACK in response to transport control or data preset commands sent from the external controller. The controlled device will send back a return command in response to data sense commands that request a data value specified on the controlled device. When the status of the controlled device changes, such as from Stop to Play mode, or when an error etc. occurs, the controlled device will send a command indicating this to the external controller. Examples of the command sequence are given below. You must leave an interval of at least 20 ms between commands. Example 1: Controlling the transport of the controlled device This example describes the Play operation. When the controlled device receives the PLAY command and enters Play mode, it will transmit a CHANGED STATUS command. ACK is not transmitted for the PLAY command. Command External controller Controlled device PLAY -> State of controlled device AUTO CUE LEVEL set to -54dB Example 3: Obtaining specified data This example describes obtaining the currently-set AUTO CUE LEVEL. When the controlled device receives the AUTO CUE LEVEL PRESET (Sense) command, it will return the currently-set AUTO CUE LEVEL. Command External controller Controlled device AUTO CUE PRESET (Sense) LEVEL ->