Measurement Computing Serial488/4 - Manual (Page 63)

Section 3 Command Descriptions
3.24
M8
SRQ on serial port #4 data in
M16
SRQ on Ready
M32
SRQ on error condition
M128
SRQ on memory low condition
Note: the status indication reflects the sum of all received Service Request commands.
P#
Selected Port
P1
Port 1 selected
P2
Port 2 selected
P3
Port 3 selected
P4
Port 4 selected
U#
Status message
U0
Command status
Y#
Terminator
Y0
CR only
Y1
LF only
Y2
CR LF
Y3
LF CR
Z#####
Free buffer memory available for serial data
Below is a summary of the Serial Port Status (U1-4) information.
A#
Stop Bits
A0
1 stop bit
A1
2 stop bits
B###
Baud Rate
B0
110 Baud selected
B1
300 Baud selected
B2
600 Baud selected
B3
1200 Baud selected
B4
1800 Baud selected
B5
2400 Baud selected