Motorola 68P02958C00-B - Manual (Page 226)

SW Diagnostics & Loggers
5-169
The names of the devices of the Link and Physical layers are taken from the logical names of
the links, as defined by the user in the Site Configuration program. There is no connection
between the number that is part of the device name and the port number.
For example, the device of the link of port 3 is named RAD1L, since the link name is RADIO1
and L indicates a link device.
The IP Gateway communication supports two modes of transmission:
•
Synchronous mode (may be used in ports 3 and 4 of the CPU module)
•
Asynchronous mode, UART (all ports of the CPU module)
Port 3 is used in the Synchronous mode of transmission, when:
1) A radio of any type is connected.
2) A modem is connected and synchronous communication is defined in the Site
Configuration program (except dial-up mode that allows only asynchronous mode of
operation).
3) An RS232 Synchronous piggyback is connected to ports 3 and 4.
When the communication is synchronous (bit oriented), the physical channel consists of the
Link device and Physical device. The transmitted frame is composed of a stream of bits that
starts and ends with flags that indicate the frame limits.
When the communication is asynchronous (byte oriented), the frame is broken down and
encoded into a series of bytes, transmitted and received by a UART. This type of
communication is handled by the Adapter device.
To get the statistics of a specific device, define the device name, the Site ID, and also the
Level of request. All devices in the system have a level of request, starting from Level 0.
Level 10 and Level 11 should be used to get communication statistics.
The following table provides the device names that respond to Level 10 and Level 11.
Layer Name
Device
Name
Notes
Mini-Session EVNT
STCL
for Event application
for Group-Control application
Transport TRANSx x – logical channel
Network NETWRK –
Link COMxL
RTUxL
RADxL
LINxL
TSxL
for COMPUTER link
for RSlink
for RADIO link
for LINE link
for link above Terminal Server
x – logical number