QB Series - Rice Lake Weighing Systems

Units(U1, U2 = 2 words, based on ASCII codes)sp g gram gc t carat cto z ounce ozo t troy ounce oztg g grain grTable 5-7. Units (Continued)Conditional Response Parameter For Comparator Function(S1 = 1 word)S1 Code Contentsl 4CH Low (under)g 47H Good (accept)h 48H High (over)Table 5-8. Conditional Response Parameter for Comparator FunctionStatus of Data(S2 = 1 word)S2 Code Contentss 53H Data stabilizedu 55H Data unstabilizede 45H Erroneous data; all data unreliable except S2 (devicedisplay reads either “o-Err” or “u-Err”)Table 5-9. Input Command, Data ReceptionThe balance can be controlled by transmitting commands from an external device and is independent of thetiming on the device due to the full duplex nature of the interface. If the command is properly received, thebalance transmits acknowledgement (ACK, code 06H). If the command is unacceptable, the balance transmitsnon-acceptance (NAK, code 15H).In the conventional display weighing mode (non-counting mode), the device responds with ACK or NAK withinone second of receipt of command.When transmitting function code changes, such as unit of measure, conditional response parameter, orcalibration commands, ACK or NAK are transmitted after completion of the requested command process (e.g.,when the new parameter has been set and confirmed). Commands that are sent before ACK or NAK aretransmitted from the device are ignored.Input format command consists of four (4) words, including terminators (CR=0DH or LF=0AH) as follows:1 2 3 4C1 C2 CR LFExternal tare command is as follows:C1 C2 CODE ContentsT sp 54h 20H Tare Command22 QB Series Operation Manual