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Command:RDSBYTE (RB)
- MS2000 or RM2000 syntax
-
Shortcut RB Format RDSBYTE [axis] = [status_byte]…
- Tiger syntax
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Shortcut RB Format RDSBYTE [axis] = [status_byte]… Type Axis-Specific
Requests the TG-1000 and MS-2000 to respond with the Status Byte.
Status Byte Format
76543210 → bit position (0 is LSB)
00001010 → bit pattern for hex 0x0A
MSB::LSB → most significant bit - least significant bit
The number is one byte, which can be broken down into 8 bits that represent the following internal flags:
| Bit 0 | 0 = No commanded move is in progress. 1 = A commanded move is in progress. This bit is synonymous with the STATUS command. If the bit is set, then STATUS returns B, otherwise STATUS returns N. |
|---|---|
| Bit 1 | 0 = The axis is disabled. 1 = The axis is enabled. Axes can be re-enabled using one of the following: High Level command MC <axis>+, cycles the clutch switch for the Z-axis, Low Level Start Motor command (hex 47), or a system reset. |
| Bit 2 | 0 = Motor is inactive (off) 1 = Motor is active (on). |
| Bit 3 | 0 = Joystick/Knob disabled 1 = Joystick/Knob enabled |
| Bit 4 | 0 = Motor not ramping 1 = Motor ramping |
| Bit 5 | 0 = Ramping down 1 = Ramping up |
| Bit 6 | Upper Limit Switch: 0 = Open 1 = Closed |
| Bit 7 | Lower Limit Switch: 0 = Open 1 = Closed |
Reply
:<byte as hexadecimal>
MS-2000 Example
RB X :<0x8A> RB X Y :<0x8A><0x0A> RB X Y Z :<0x8A><0x0A><0x0A>
TG-1000 Example
1RB X Y :<0x8A><0x0A>
The X-axis example value of 0x8A means the following:
Bit7: 1 - X Axis is at its lower limit
Bit6: 0 - X Axis upper limit switch open
Bit5: 0 - Ramping down, if ramping
Bit4: 0 - Motor not ramping
Bit3: 1 - Joystick/Knob is enabled
Bit2: 0 - Motor power is off
Bit1: 1 - X Axis is enabled
Bit0: 0 - No commanded move is in progress
Note: Motor power can be on while a commanded move is not in progress and the stage appears not to be moving. This happens when the motor is either making a final adjustment to a commanded move or when it is applying a force to maintain the stage position.