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ENC-900 Operating Manual: Chapter 4 Configuration
S Register 116 - Packet Character Timeout
This register has valid entries of 0 to 254 milliseconds. The Packet
Character Timeout timer looks for gaps in the data being received from the
DTE. The timer is only activated after the Minimum Packet Size has been
accumulated in the modem. After which, if the timer detects a gap in the
data exceeding the Packet Character Timeout value, the modem will
transmit the data.
The ENC-900 will accumulate data in its buffers from the DTE until one of
the following requirements is met (whichever occurs first):
•
The Maximum Packet Size (in bytes) has been accumulated;
•
The Minimum Packet Size has been accumulated AND the Packet
Character Timeout interval has elapsed.
The default for the Packet Character Timeout is 5 ms. If set to 0 ms, the
unit will buffer exactly the minimum packet size before transmitting.
S Register 113 - Packet Retransmissions
This register applies to both Master and Repeater operation. It does not
apply to Remote operation. In point-to-multipoint mode, the Master will
retransmit each data packet exactly the number of times defined by the
Packet Retransmissions parameter. In point-to-point mode, the Master will
only retransmit the packet if it does not get an acknowledgement from the
Remote with which it is communicating. In this case, the Master will
continue to retransmit until an acknowledgement is received, or the
retransmission limit is reached. When the retransmission limit is reached,
the Master discards the packet. The Master retransmits once at the
beginning of each hopping interval until the limit is reached. This
parameter is not necessary in Remote units since all Remotes receive
acknowledgement from the Master, and needn’t blindly retransmit if it has
knowledge that the Master has received the packet.. As discussed
previously, the Repeater effectively behaves as both a Master and a Remote.
When the Repeater is tuned to its Secondary Hopping Pattern (acting as a
Master), the Packet Retransmissions Parameter comes into play. The
Repeater will re-send packets of data on to Remotes or other Repeaters
exactly the number of times defined by the Packet Retransmissions
parameter.
Recipients of the packet will discard any duplicates. The valid settings for
this parameter are 0 to 255 retransmissions. The default is 1.
S Register 114 - Sleep Mode
Depend on the level of setting; the radio will turn most of the internal
circuit off to save the power consumption. The allowable settings for this
register are:
*0 Disabled
1
Level 1- recommend to use in Point-to-Multipoint
protocol, radio will turn most of the internal
circuit off as well as skip certain hop to save
power.
2
Level 2 – recommend to use in Peer-to-Peer protocol,
radio will turn off all of the internal circuit
except the I/O and Serial Data Input Interrupt.
Summary of Contents for ENC-900
Page 9: ...ENC 900 Operating Manual Chapter 2 Electrical Physical 5 ...
Page 17: ...ENC 900 Operating Manual Chapter 2 Electrical Physical 13 ...
Page 44: ...40 ENC 900 Operating Manual Chapter 4 Configuration ...
Page 46: ...42 ENC 900 Operating Manual Appendix A Modem Command Summary ...
Page 48: ...44 ENC 900 Operating Manual Appendix B Factory Default Settings ...
Page 50: ...46 ENC 900 Operating Manual Appendix C Technical Specifications ...
Page 54: ...50 ENC 900 Operating Manual Appendix E Approved Antennas ...
