Westermo RM-455U-D - Manual (Page 80)

Appendix C S-Registers
Man_455U-D Rev 3.04 Page 81
Appendix C S-Registers
The following table lists the S-Registers supported by the 455U-D modem.
No. Range Function Comment
S0 0-255 Attempts before
Answering Call
Should normally be set to 1. 0 disables auto
answering of calls (ATA command to answer calls
only).
S1 3-255 Escape Sequence
Guard Time
Units 20 milliseconds. Min. Delay before and after
entering the escape sequence (“+++”) also Max.
Delay between characters of the escape sequence.
S2 1-255 Escape Sequence
Character
Normally 43 = “+”
S3 0-127 Carriage Return
Character
Normally 13 =
S4 0-127 Line Feed Character Normally 10 =
S5 0-127 Back Space Character Normally 8 =
S6 0-255 Inactivity Timer /
Link Check Timer
Units Seconds. 0 disables. How frequently to send a
“Link Check” message. Usually set less than the
timeout set by the AT\T command. Default 0.
S7 1-255 Number of Connection
attempts
(Acknowledged Mode)
How many times to attempt a connection after an
ATD command. Default 5.
S8 0-255 Test Timer Units Seconds – How long to run tests (AT&Tx)
S9 0-255 Modem Receive Level Units (-)dBm – RSSI indication of last received
message. AT&T5 command may be more useful.
S10 0-255 DTR Loss Detection
Time
Units 10 milliseconds (Not Implemented)
S11 0-255 Change Over Delay
Time or Dual
Redundant Timeout
The trigger condition must be present for the time
period for the changeover to occur. Minimum time
period is 5 seconds
S12 read-
only
Command Mode
Diagnostic Reason modem last returned to command mode, i.e.
connection lost.
S12 = 0 Reset (ATZ or Power Up).
S12 = 1 Escape sequence (“+++”)
S12 = 2 DTR lowered.
S12 = 3 No ACK from remote modem after connected.
S12 = 4 Activity timer timed out.