User`s guide

DC 900-1343D 55

Chapter

DDCMP Link

Conﬁguration Options

This chapter describes the various link conﬁguration options that can be set using the

dlWrite Configure Link command as described in Section 2.5.1.1 on page 41.

Table 3–1 lists all the available options, the allowed settings, and the defaults. The

defaults are in effect immediately after the protocol software is downloaded to the ICP.

They remain in effect until you send a

dlWrite Conﬁgure Link command or redown-

load the protocol software to the ICP.

Note

Link conﬁguration options can be set only when the link being

conﬁgured is stopped.

3.1 Data Rate Option

The data rate can be set by the client for installations using internal clocking, where the

communications server must generate the data clocking signal. If external clocking is

provided by a modem or modem eliminator, the conﬁguration of the data rate is not

required. The allowable data rates depend on the setting of the Line Mode option

(Section 3.4).

The data rate on a link can be set from 300 through 38,400 bits/second (and up to

263,100 bits/second for synchronous line mode). When using data rates above 19,200

bits/second, be careful not to overload the communications server processor. Freeway