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4.0 Register/Command Reference
Values
S163 CRC Check on Diag Port
0 - Disable
1 - Enable
Enables CRC checking of received data on local diagnostic port
Default - 1 (enable), 0 - disable. Note that even if disabled,
the incoming data must have two dummy bytes transmitted in place of
CRC bytes. See the P2400 Diagnostic Channel Protocol Manual for
more information.
Values
S167 Tx Enable
0 - Disable
1 - Enable
Tx Enable 0 - Disabled, 1- Enabled (default)
Enables RF emission.
Modem will never transmit data if disabled, it will be in a listen only
mode.
Values (0 - 254)
5
S213 Packet Retry Limit
Packet Retry Limit(0 - 254). Valid only for repeater's uplink (from child
to parent)
Values (0 - 254)
0
S214 Diagnostics Packet Retransmission
Enables the retransmission of Diagnostic Packets. Diagnostics Packet
Retransmission(0 - 254). 0 - (default)
See the P2400 Diagnostics Manual for more information.
Values
S217 Protocol Type
0
transparent
1
MODBUS RTU
2
DF1 protocol, full-
duplex, with address
filtering
For most applications, the default value of 0 - resulting in transparent
operation - will be maintained in this register. Setting this register to a
value of 1 specifies MODBUS operation, in which the modem will
frame the output data and comply with MODBUS specifications.
S217=2 configures the modem for DF1 filtering. In this mode, the
PLC’s address must match the Unit Address of the modem. Data not
intended for a specific PLC/Modem pairing will be blocked from
passing through the modem to the attached PLC.
Values
S238 Hopping Mode
0 - Hopping on pattern
1 - Hopping on frequency table
2 - Hopping on channel
3 - Hopping on frequency
Hopping mode register (S238) is preset by manufacturer. It is a read-
only register for the end user. S238 controls the modem either hopping
on pattern or on frequency table.