Polling Mode Options - Microscan Quadrus MINI Imager User Manual

Polling Mode Options

Polling Mode Options

Definition:
These parameters only take effect for Polling Mode
RS-232 or RS-422 ports (not on the Auxiliary Port), and are completely
independent of the ACK/NAK Options <K147>.
The values of protocol characters can be changed, but the protocol events
cannot be disabled. The polling mode address is configured in the
command (see
To enable true multidrop protocol, the RS422/485 port must be enabled,
<K102,1>, in order to turn the transmitter on and off. If RS-232 is enabled
instead of RS422/485, <K102,0>, then Polling Mode will operate as a
Point-to-Point polling protocol. This is because the RS-232 transmitter is
always left on when enabled.
Serial Cmd:
<K148,RES,REQ,STX,ETX,ACK,NAK>
RES-NAK Defaults
RES: (Reset)
REQ: (Request)
STX: (Start of Text)
ETX: (End of Text)
ACK: (Acknowledge)
NAK: (Negative Acknowledge)
Note: See Polling Mode Data Flow Examples
communication scenarios.
Note: See USB HID Interface
3-8
Poll Address on page 3-6).
04
05
02
03
06
15
in Appendix E for sample Polling Mode
on page 3-23 for protocol information relating to USB.
<K140,5> on the main
Quadrus MINI Imager User's Manual
<K140>