Panasonic FP2 ET-LAN Technical Manual page 116

Precautions concerning format
The number of bytes comprising the MEWTOCOL-DAT command or message is converted to
-
hexadecimal data and specified for the "Data Size" parameter.
The "Station Number for Relay Station" and "Route Number for Relay Station" parameters should be
-
specified using the pertinent number. If there is only one relay station, the spaces for the second and
third relay stations will be filled in, closing the gap.
The station number of the station sending the command is specified for "Source for MEWTOCOL
-
station number".
The station number of the station receiving the command is specified for "Destination for MEWTOCOL
-
station number".
For the command, the same value, within a range of "01H to 03H", should be specified for both the
-
"Hierarchy level (LEVEL)" and "Hierarchy depth (DEPTH)" parameters.
With the responses, "Hierarchy level (LEVEL)" is fixed at 00H.
-
"Destination (Source) MEWTOCOL station No." is specified by converting to hexadecimal data.
-
Key Point:
The route number is a number that is automatically allocated to differentiate units if multiple link-related
-
units are being used on the same backplane.
With the FP2, this applies to ET-LAN units, multi-wire link units, and computer communication units.
-
Route numbers proceed in sequential order (1, 2, 3 ...), starting from the unit nearest the CPU unit.
-
I/O units other than link-related units and advanced-function units are not included in these "routes".
-
8-14