Specifications

A1.1 Settings at the board

A1.1.1Addressing of the board

The KOS 201/202 board is only pluggable in the base magazine, i.e. DTA 200

(slots 1, 2 and 3). Slot 1 however, is required by the DNP 205 power supply board,

at least when using the ALU 201 or 202. Thus, slot 2 or 3 remains in the DTA 200

rack. The communication with the ALU is performed via a dual port RAM and

the PAB1 parallel equipment bus of the system. In addition, 128 IBs and 128

OBs are used. The programmable controller user however, has only contact to

the PCS via 128 OBs (64 words altogether).

 Slot selection

Slot 2: use handling software from the 9002 programming unit directory.

Slot 3: use handling software from the 9003 programming unit directory.

Basically, slot 1 can also be used since the DNP 205 power supply board can be

operated on slot 2 or 3. In addition, all function blocks belonging to the handling

software would have to be rewritten however (replace EBx.y and ABx.y with

EB1.y and AB1.y).

A1.1.2 Baud rate settings

The baud rate setting for the communication between the PCS and the KOS 201

board is made by the software in OB1. The position (first line; instruction: L

KHxx) is mark by a comment! This constant is assigned a flag byte which in

turn submits an FB 200 parameter (BAUD). The following baud rates are possible:

1200 baud (L KH00), 4800 baud (L KH01), 9600 baud (L KH02) and 19200 baud (L

KH03).

A1.2 Description of the handling software

The enclosed FB 200 manages the data traffic between a transfer area (ABx.1 -

ABx.128) and the KOS board.

PB 200 is selected by the FB 200. This is used to copy all Ebx.y (data from the

PCS 200) onto ABx.y.

PB 201 and PB 202 are used to offer the user the possibility to install customer

specific presettings at restart (PB 201) or fault situations (PB 202) without

intervening in FB 200.

Apart from the cyclical call of FB 200 at the beginning of the programmable

controller cycle, incl. setting the baud rate with the BAUD parameter, the

implementation limits itself to reading and writing ABx.1 - ABx.128. A summary

fault bit (ERROR) enables the communication status to be evaluated via the

ladder diagram program. If this fault bit is = 1, then the data transfer has been

stopped. It can be restarted by presetting a flag (RESET). A further flag (TOGGLM)

is required for short/long cycles. This will be toggled and indicates in each

programmable controller cycle whether the programmable controller cycle can be

terminated after calling FB 200 (short cycle), or whether it is useful to process

further statement list commands (long cycle).

Description of KOS 201/202

A1. Description of KOS 201/201