User's Manual

545C Operations Manual

02/10/2012 Prerelease DCN 00001789-A

combination in between. Substitution tables must be established in both

the relay unit and also at the Master Station to manage the relay function.

When a designated GROUP report is received at the relay, it will substitute

its own ID and group number in the report as defined in its substitution

table and forward the data to a MCC-520B Master Station using the MCC-

550C RF format rather than the standard MCC-545C message format. When

the relayed data is received at the MCC-520B it reconstructs the original

data report based on its own substitution table and route the report as

required.

The following command is used to define the entries in the substitution

table for a relay unit:

SUBST,relay_id,relay_group,remote_id,remote_group

where: relay_id = relay unit’s ID

relay_group = data group report number at the relay

remote_id = originating Remote unit’s ID

remote_group = data group report number at the

originating Remote unit

5.5.5 I/O Port PASSTHRU

The PASSTHRU command allows a bi-directional connection to be made

between the different I/O ports of the MCC-545C. This will allow the

operator to configure one port to be connected to another port in a direct

ASCII mode where any characters coming in on one port will go out on the

other port, and vise-versa. For example: the command PASSTHRU,1,2

allows characters entered on port 1 to go out port 2, and characters

received on port 2 will go out port 1. There can be from 0 to 2 different

pass-through connections defined at any time. All ports given in a pass-

through connection must be assigned to some protocol and baud rate

before entering the PASSTHRU command. An error will be displayed if they

are not.