Maintenance for 2001N, 2002N, and 1800R Manual
MOD30ML and Modcell Maintenance Manual
COMMUNICATIONS
• The link can contain as many as 8 ICN interface boards each connected to a
single ICN with as many as 15 instruments. The interface board and instruments
on each ICN must have unique addresses. The hexadecimal address switch on
each interface board is factory set at 0; this allows addresses 1-15 ($1-$F) to be
assigned to the instruments via the ICN module address switch. The interface
board can be assigned any address (1-15). Be sure the interface board address
does not match the address of any instrument on the ICN.
• Note the number of each ICN. The ICNs are numbered 0 through 7 from left to
right. Earlier model links may number the ICNs 1 through 8 on the chassis,
though this address scheme is not used in the Application Builder. The ICN
number is not related to the ICN interface board address: they can have the
same numerical value.
• Note the link switch settings. The settings determine the communication
parameters for the serial port. Factory settings provide the following values:
• Odd parity, 8 data bits, and one stop bit
• 9600 baud
• Clear-to-send (CTS) permanently enabled
• RS-232 transmission standard
4. If a 1731N Mini Link or 1733N Mini Link/External is being used, verify the setup as
follows:
• The mini links provide the required interface for one ICN, and an optional
interface board supports a second ICN. Each ICN can be connected to as many
as 15 instruments. The interface board and instruments on each ICN must have
unique addresses. The hexadecimal address switch on the interface board is
factory set at 0; this allows addresses 1-15 ($1-$F) to be assigned to the
instruments via the ICN module address switch. The interface board can be
assigned any address (1- 15). Be sure the interface board address does not
match the address of any instrument on the ICN.
• On the 1731N link, which is installed in the computer chassis, ensure that the link
address and interrupt settings are different from other ports in the PC. In most
cases, it is acceptable to share an interrupt with a parallel port.
• Note the number of each ICN. If a single ICN is connected its number is 0. The
optional second ICN is number 1. The ICN number is not related to the ICN
interface board address; they can have the same numerical value.
• Note the link jumper locations. The locations determine the communication
parameters for the two serial ports. The factory settings provide the following
values:
• 9600 baud
• No parity, 8 data bits, 1 stop bit (these parameters are not
configurable)
• Clear-to-send (CTS) ignored
• RS-232 transmission standard (not configurable)
5. Verify that a wire is connected from the common of the ICN connector on the link
interface board to the common connection for the module. Be sure this wire is not
connected to earth or chassis ground. Note that the common terminal on the Mini Link
4 -3