Micromod Micro-DCI: 53MC5000 MicroLink - Manual (Page 25)

Values for the Time Delays (B04-B07) and the Time Between Transactions (B08) are dependent
upon the Datalink baud rate. For baud rates of 28.8 or 9.6 Kbaud, reference sub-section 8.3.1.1;
for all other baud rates, reference sub-section 8.3.1.2.
8.3.1.1 MICROLINK SUPERVISOR-PC UNIT PARAMETER REFERENCE TABLE
If the Datalink network data rate is at 28.8 or 9.6 Kbaud, then the MicroLink SUPERVISOR-PC unit
parameters B04 through B08 are set up as defined in Table 8-1. Values provided in Table 8-1 are
initial settings that may require optimizing depending upon the MicroLink and Datalink applications.
Table 8-1. MicroLink SUPERVISOR-PC Unit Values for B04 - B08
Datalink at 28.8 Kbaud:
No. of SUPVRs Accessing
Instruments via Gateway
1 2 3
B04 - B07 2 2 2
B08 - Time (ms) Between
Transactions 0 14 39
Max. Gateway Accesses
Per SUPERVISOR 70/sec 19/sec 11/sec
Datalink at 9.6 Kbaud:
No. of SUPVRs Accessing
Instruments via Gateway
1 2 3
B04 - B07 3 3 3
B08 - Time (ms) Between
Transactions 0 15 39
Max. Gateway Accesses
Per SUPERVISOR 30/sec 11/sec 8/sec
8.3.1.2 APPROXIMATING MICROLINK SUPERVISOR-PC UNIT PARAMETERS
When accessing Datalink devices through the 53MC5000 PCS gateway for configurations not cov-
ered by Table 8-1, it is necessary to calculate the MicroLink SUPERVISOR-PC unit Time Delays
(B04-B07) and Time Between Transactions (B08) values. Mathematical expressions to obtain
these two values are as follows:
Time Delay Value B04-B07 = (Transaction Time [see Table 8-2] + Instrument and Gateway
Turn-around Time)/10 [Rounded up]
Time Between Transactions B08 = [(10 X Time Delay Value) X (Number of MicroLink SUPER-
VISOR-PC units - 1)]
Table 8-2. Baud Rate - Transaction Time (ms)
Kbaud Transaction Time (ms)
28.8 8.5
19.2 12.5
9.6 25.0
4.8 50.5
2.4 100.0
1.2 202.0
Section 8. Configuring the 53MC5000 PCS as a Gateway
26