Rice Lake TC Series, Rice Lake Weighing Systems - RS-232 Option Card Installation Manual - Manual (Page 11)

7 RS-232 Option Card
1.12 Result of judgment when operating balance with the limit function
(S1: one character)
Status (S2: one character)
1.13 Input Commands
Users can control the balance remotely by transmitting commands from an external device. Two types of control commands
are available:
• Instruction for tare subtraction
• Setup of output control
1.14 Command Transmission Method
• A command is transmitted to the balance from an external device. Since the data flow (transmission and reception) is
stored by a full-duplex system, commands can be transmitted regardless of their data-transmission timing.
• When the balance has executed the received command, it activates a normal end response or transmits the requested data,
via the transmitting command. If the balance was unable to execute the command or received an erroneous command, it
transmits an error end response. If the balance is working properly, it usually returns a response within a second after it
receives the transmitted command. If the balance receives a transmission while it is conducting a procedure (such as the
setup of a function or a span adjustment), it will transmit a response when the procedure finishes.
• When transmitting more than one command to the balance from a remote device, wait until you have received a
confirmation on the first transmission before transmitting the next.
1.15 Command Format
• Command format
Composed of four characters (ASCII), including the terminators (CR=0DH, LF = 0AH)
• Instruction for tare subtraction (zero adjustment)