Process data

The System Manager shows the EPI3xxx/ERI3xxx process data which are arranged in the tree structure under the associated Port (A) (in the following example EPI3174-0002 is connected to port 1).

The EPI3174-0002/ERI3174-0002 offer 16-bit status information and the analog value (16 bit) per channel (B) for transmission.

Process data 1:
Default process data of EPI3174-0002

A detailed representation of the structure is obtained by opening the tree structure of the Channel 1 status (see A in the following figure).

Activation of the Show Sub Variables button (C) displays the detailed view of the different bit meanings (see B in the following illustration). The plain text display of the bit meanings is particularly helpful not only in commissioning, but also for linking to the PLC program.

Process data 2:
Process data of EPI3174-0002 represented with sub variables

By right-clicking on the Status variable in the configuration tree (A), the structure can be opened for linking. Both the collective name e.g. Channel 1 Status and the individual bit variable e.g. Overrange can be linked, but not both at the same time.

The bit meaning i.e. offset position can then be taken from the memory assignment display (E) on the basis of the point notation, also taking into account the variable size (D).

Example:

163.1 means here that the 1st bit (counting method 0, 1, etc.) or 2nd bit (counting method 1, 2, etc.) in the status word indicates the Overrange. The user requires this information in the PLC if the status word is to be divided into its bit meanings.

Control/status word

Status word

The status word (SW) is located in the input process image, and is transmitted from terminal to the controller.

Bit

SW.15

SW.14

SW.13

SW.12

SW.11

SW.10

SW.9

SW.8

Name

TxPDO Toggle

TxPDO State

Sync error

-

-

-

-

-

Bit

SW.7

SW.6

SW.5

SW.4

SW.3

SW.2

SW.1

SW.0

Name

-

ERROR

Limit 2

Limit 1

Overrange

Underrange

Key

Bit

Name

Description

SW.15

TxPDO Toggle

1bin

Toggles with each new analog process value

SW.14

TxPDO State

1bin

TRUE in the case of an internal error

SW.13

Sync error

1bin

TRUE (DC mode): a synchronization error occurred in the expired cycle.

SW.6

ERROR

1bin

General error bit, is set together with overrange and underrange

SW.5

Limit 2

1bin

See Limit
0: Limit function is not active
1: Value < Limit value in Index 0x08n0:13
2: Value > Limit value in Index 0x08n0:13
3: Value = Limit value in Index 0x08n0:13

SW.4

1bin

SW.3

Limit 1

1bin

See Limit
0: Limit function is not active
1: Value < Limit value in Index 0x08n0:14
2: Value > Limit value in Index 0x08n0:14
3: Value = Limit value in Index 0x08n0:14

SW.2

1bin

SW.1

Overrange

1bin

Analog input signal lies above the upper permissible threshold for this terminal

SW.0

Underrange

1bin

Analog input signal lies under the lower permissible threshold for this terminal

Control word

The EPI3xxx/ERI3xxx do not have a control word.