BASEstar^tm Open DAS
for Allen-Bradley Data Highway^tm
on Tru64^tm UNIX
Installation and User's Guide

Figure 3-24 shows the structure of a legal Timer, Counter, Control, ASCII String, PID Control or Message Control data table address for the PLC-5/250.

Figure 3-25 shows a PLC-5/250 Timer structure.
Figure 3-26 shows a PLC-5/250 Counter structure.
Figure 3-27 shows a PLC-5/250 Control structure.
Figure 3-28 shows a PLC-5/250 ASCII String structure.
Figure 3-29 shows a PLC-5/250 PID Control structure.
Figure 3-30 shows a PLC-5/250 Message Control structure.
Figure 3-25 shows a PLC-5/250 Timer structure.
Figure 3-25 shows a PLC-5/250 Timer structure.

Table 3-18 shows examples of legal Timer, Counter, Control, ASCII String, PID Control and Message Control data table addresses for the PLC-5/250.

Figure 3-24 PLC-5 / 250 Timer, Counter, Control, ASCII String, PID Control and Message Control Address Format

Figure 3-25 PLC-5 / 250 Timer Structure

Figure 3-26 PLC-5 / 250 Counter Structure

Figure 3-27 PLC-5 / 250 Control Structure

Figure 3-28 PLC-5 / 250 ASCII String Structure

Figure 3-29 PLC-5 / 250 PID Control Structure

Figure 3-30 PLC-5 / 250 Message Control Structure

Table 3-18 Example PLC-5 / 250 Timer, Counter, Control, ASCII String, PID Control and Message Control Address Formats

Example Address	MMS Type1	Description
$0T20:0.ACC	UNSIGNED_32	Timer 0 in file 20 accumulated value
0C91:3.PRE	INTEGER_16	Counter 91 in file 3 preset value
0T3:20.CTL/31	BIT_STRING	Timer 20 in timer file 3 Enable bit 2
1R6:0.UL	BIT_STRING	Control 0 in file 6 unload bit 2
0T4:20.TD	BIT_STRING	Timer 20 in file 4 timer done bit 2
1R6:1.LEN	INTEGER_16	Control 1 in control file 6 length value
0ST16:0.LEN	INTEGER_16	String 0 in file 16 length value
0ST16:2	VISIBLE_STRING 3	String 2 in file 16
0ST16:3	OCTET_STRING 3	String 3 in file 16
0PD17:2.DVDB	FLOAT	PID Control 2 in file 17 Deviation Alarm Dead Band
0PD17:2.EN	BIT_STRING	PID Control 2 in file 17 Enable
0PD17:1.ADDR[0]	INTEGER_16	PID Control 1 in file 17 Master-to-slave address 0
0MSG18:3.RLEN	INTEGER_16	Message Control 3 in file 18 Requested Length
1T0:5	Structure 4 UNSIGNED_16 UNSIGNED_32 UNSIGNED_32	All of timer 5 in file 0 Control Preset value Accumulated value
0R8:10	Structure 4 UNSIGNED_16 INTEGER_16 INTEGER_16	All of control 10 in file 8 Control Length Position
0PD17:0	Structure 4 UNSIGNED_32 FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT FLOAT Array of 4 UNSIGNED_16 Array of 14 FLOAT	All of PID Control 0 in file 17 Control Set point Proportional gain Initial gain Derivative gain Output bias % Maximum scaled value Minimum scaled value Dead band Set output % Maximum output limit Minimum output limit Update time Process variable Error:scaled Output PV alarm high PV alarm low Deviation alarm + Deviation alarm - PV alarm dead band Deviation alarm dead band Maximum input Minimum intput Tieback % Master-to-slave address Reserved/internal use
0MSG18:2	Structure 4 UNSIGNED_16 INTEGER_16 INTEGER_16 INTEGER_16 Array of 52 INTEGER_16	All of Message Control 2 in file 18 Control Error code Requested length Done length Reserved/internal use