United Security Products AVD-45c Manuál stáhnout pdf (Strana 146)

132 UDC 6300 Process Controller Product Manual 1/03

4.14 Communications Set Up Group, Continued

Table 4-13 Communications Group Definitions, continued

Lower Display Prompt Upper Display

Range of Setting

or Selection

Parameter

Definition

SHED2MODE

LAST

TO MAN

FSAFE

ToAUTO

SHED CONTROLLER MODE AND OUTPUT LEVEL

FOR LOOP 2

— Determines the mode of local control you

want when the controller is shed from the communications

link.

LAST — SAME MODE AS BEFORE SHED — The

controller will return to the same mode (manual or

automatic) that it was in before shed.

TO MAN — TO MANUAL MODE BUMPLESS OUTPUT —

The controller will return to manual mode at the same

output level that it had before shed.

FSAFE — TO MANUAL MODE, FAILSAFE OUTPUT —

The controller will return to manual mode at the output

value selected at “CONTROL” prompt “FAILSAFE”.

ToAUTO — To automatic mode.

SHED2SP

TO LSP

TO CSP

SHED SP FOR LOOP 2 — Shed setpoint recall.

TO LSP — Controller will use last local SP used.

TO CSP — Controller will use computer setpoint.

CSP2 RATIO

–20.00 to 20.00

LOOP 2 COMPUTER SETPOINT RATIO — Computer

Setpoint Ratio for Loop 2.

CSP2 BIAS

–999.0 to 9999

LOOP 2 COMPUTER SETPOINT BIAS — Computer

Setpoint Bias for Loop 2.

RCAS2MOD

485TDCSDI only

SPC

DDC

M/A STN

REMOTE CASCADE OPTION FOR LOOP 2 — Lets you

select a Remote Cascade control architecture.

SPC (Supervisory Control) — The setpoint of the

secondary controller is controlled by a higher level

(Primary) controller.

DDC (Direct Digital Control) — The Output of the

secondary controller is controlled by the Output of the

higher level (Primary) controller.

MANUAL AUTO STATION—Allows the control loop to

behave as a Manual Auto Station whereby only manual

control is available at the UDC and Auto control is

performed in a computer or PLC.

TESTCOM

(replaces LOOPBACK)

ENABLE

DISABL

TEST COMMUNICATIONS—When enabled, causes the

UDC to transmit a protocol-oriented broadcast message. It

is useful for ensuring the device is connected properly and

that its Baud Rate, Parity, and communication type are

compatible with the host computer.

For Modbus, TDC, and DMCS, the message is:

where:

AA is an 8-bit address

<CRC> is a 16-bit cyclical redundancy check

For ASCII, the message is:

where:

AA is the device address

<CR>,<LF> are carriage return, line

feed end of string indication

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