Measurement Computing Digital488/80A - Manual (Page 76)

System Status (U0) Return Codes
C# Configuration
C0 All 5 ports are input.
C1 Port 1 is output; the other ports are input.
C2 Ports 1 and 2 are output; the other ports are input.
C3 Ports 1 through 3 are output; the other ports are input.
C4 Ports 1 through 4 are output; Port 5 is input.
C5 All 5 ports are output.
E# Query Error Status
E0 No Error.
E1 Unrecognized Command.
E2 Invalid Command Parameter.
E3 Command Conflict Error.
E5 Non-Volatile RAM Checksum Failure.
E6 Internal Data Buffer Overrun
Note: Except for E5 , error is cleared upon reading error status.
F# Data Format
F0 ASCII hexadecimal (4 bits per character).
F1 ASCII character (4 bits per character).
F2 ASCII binary (1 bit per character).
F3 ASCII decimal (8 bits per number).
F4 Binary (each byte = 8 bits).
Note: In Data Format F5 (high-speed binary), the command interpreter is disabled.
G# Bus Input/Output
G0 Input and output port data are sent when addressed to Talk.
G1 Only input port data is sent
G2 Only output port data is sent
G3 Buffered input and output data are sent
G4 Continuous buffered input and output data are sent
I### Invert
I0 All handshaking/control lines are active high, all data lines are high true.
I1 The Inhibit output line is active low.
I2 The Trigger output line is active low.
I4 The Data Strobe output line is active low.
I8 The Clear output line is active low.
I16 The Data lines are low true.
I32 The EDR input line is falling-edge sensitive.
I64 The Service input line is falling-edge sensitive.
Note: The status message reflects the sum of all received Invert commands.
70 Digital488/80A Commands 967695 Digital488/80A User's Manual