User`s guide

74 DC 900-1317J
ADCCP NRM Programmer’s Guide
The loc_size variable specifies the length of the local station address. The rem_size vari-
able specifies the length of the remote station address. If an address length of zero is
specified, the associated address field is undefined.
If ADCCP option 7 is disabled, the maximum address length is 1 (octet). Basic address-
ing allows a theoretical maximum of 254 unique station addresses on the link (0 is an
invalid address, and 255 is reserved as the global address). Protogate supports up to 128
secondary stations per ICP.
If ADCCP option 7 is enabled, the maximum address length specification is 4 (octets).
This allows a theoretical maximum of 268,435,455 unique station addresses on the link.
Protogate supports up to 128 stations per ICP multiplexed on a single physical link
when extended addressing is used.
If your ADCCP network connection requires conformance to FED-STD-1003-A
address field format, then stations for which ADCCP option 7 is disabled cannot use
even addresses. If your ADCCP network connection requires support for one or more
stations with even addresses, then every station must be configured with ADCCP
option 7 disabled.
The loc_addr array contains the local station address octets. The first octet of the local
station address (if defined) is in
loc_addr[0]. If ADCCP option 7 is disabled, this is the
only local address octet. If ADCCP option 7 is enabled, up to four local address octets
may be specified.
The rem_addr array contains the remote station address octets. The first octet of the
remote station address (if defined) is in
rem_addr[0]. If ADCCP option 7 is disabled, this
is the only remote address octet. If ADCCP option 7 is enabled, up to four remote
address octets may be specified.
Whether ADCCP option 7 is enabled or disabled, FED-STD-1003-A address field for-
mat requires that bit 0 in all except the final address octet must be reset to zero; bit 0 in