Installation manual

Publication 1747-RM001G-EN-P - November 2008
SLC 5/03 (OS30x), SLC 5/04 (OS40x) and SLC 5/05 (OS50x) Firmware History A-15
OS302, Series C, FRN 7
OS401, Series C, FRN 7
OS501, Series C, FRN 7
released: November 2003
Enhancements
• SLC 5/03 channel-to-channel passthru including the following
operations:
– Channel 0 DF1 Local to Channel 1 DH-485 Remote
– Channel 0 DF1 Local to Channel 1 DH-485 Local
– Channel 0 DH-485 Remote to Channel 1 DH-485 Remote
– Channel 1 DH-485 Remote to Channel 0 DH-485 Remote
• DF1 radio modem driver
Additions of Store and Forward and several handshaking protocols to
the DF1 Radio Modem driver enhance the flexibility of this driver. Store
and Forward operation allows nodes to re-broadcast packets received
that are not targeting the listening node. This is an important addition
for messaging to out-of-range nodes using in-range nodes as repeaters.
Two handshaking protocols were added to support handshaking
methods used by many radio modems. The two new handshaking
protocols include:
– Half-duplex with Continuous Carrier
– Half-duplex without Continuous Carrier
Half-duplex with Continuous Carrier implies that the state of the carrier
input signal DCD is ignored for transmissions.
Half-duplex without Continuous Carrier implies that the state of the
carrier input signal DCD determines if the SLC processor can transmit
or receive. If the DCD is high, then receptions are possible. If DCD is
low, then transmissions are possible.
• Clearing DF1 communication buffers with ASCII Clear Buffer (ACL)
instruction
This enhancement provides the ability to clear DF1 communication
buffers using the ACL instruction. This enhancement is useful in
Master/Slave applications when communication errors result in the
slave buffers filling up so that it can no longer respond to the Master,
and the Master is not polling the Slave because it is no longer getting any
responses. In this situation the Channel 0 Incoming Command Pending
bit, S:33/0 will be set.