Flowserve DDC-100 Modbus Direct-to-Host User Manual

Page 11

DDC-100 Direct-to-Host Programming Guide

FCD LMAIM4019-00

DDC-100 Direct-to-Host Programming Guide

Table 3.5 – Field Unit Register Definitions (continued)

Register

Number

Register Name

MX/DDC Meaning

UEC-3-DDC Meaning

User Faults

Bits 1-15 – Not Used

Value of 16 Bits
Bit 0 User Fault 0
Bit 1 User Fault 1
Bit 2 User Fault 2
Bit 3 User Fault 3
Bit 4 User Fault 4
Bit 5 User Fault 5
Bit 6 User Fault 6
Bit 7 User Fault 7
Bit 8 User Fault 8
Bit 9 User Fault 9
Bits 10-15 Reserved

Current State

Bits 0-15 – Not Used

Value of 16 Bits
Bit 0 Waiting to Open
Bit 1 Waiting to Close
Bit 2 Running Backward
Bit 3 Invalid Configuration
Bit 4 Reverse Switches
Bit 5 OK to Modulate
Bits 6-15 Reserved

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

Field Unit

Holding Register

Special Applications Only

24-44

Reserved

Special Applications Only

45-47

Not Named

Special Applications Only

TP_START_

POSITION

Special Applications Only

TP_STOP_POSI-

TION

Special Applications Only

TP_SAMPLE

Special Applications Only

TP_MID_T_HIGH Special Applications Only

Special Applications Only

TP_MID_T_POS Special Applications Only

Special Applications Only

Table 3.5 – Field Unit Register Definitions (continued)

Register

Number

Register Name

MX/DDC Meaning

UEC-3-DDC Meaning

TP_MID_T_AV_

VAL

Special Applications Only

TP_STOP_VAL

Special Applications Only

TP_BEFORE

MID_T_HIGH_

Special Applications Only

TP_AFTER

MID_T_HIGH

Special Applications Only

Note 1: Torque will be expressed proportionally as a reference only from 40-100% inclusive. Initial indication

may read 0% until torque exceeds 40% minimum.
Note 2: Default value is scaled 0-100 of span. Changes made to “Scale Analog” affect Analog registers (3, 4,

6, 7, 8) and “move-to” commands.
Note 3: Combined Fault bit is a value of 1 or true when bit 5 or 8 or 9 or 15 or (bits 10 and 11) is a value of 1

or true.
Note 4: Channel A is physical connection A1. Channel B is physical connection A2.
MX/DDC actuators shipped prior to 2nd QTR, 1999, have the following definition for Register 9 bit 6. When

this bit has a value of 1 or true, the actuator selector switch is in LOCAL mode. This bit does not indicate

STOP or REMOTE. The actuator selector switch in REMOTE (available for network control) is indicated by

Register 12 bit 00 having a value of 1 or true. Register 9 bit 6 value 0 (zero) or false AND Register 12 bit 00

value 0 (zero) or false indicates selector switch is in the STOP position.
MX/DDC actuators shipped after 2nd QTR, 1999, have the following definition of Register 9 bit 6. When this

bit has a value of 1 or true, the actuator is in LOCAL or STOP (unavailable for network control). The actuator

selector switch in REMOTE (available for network control) is indicated by Register 12 bit 00 having value

of 1 or true.
IMPORTANT: Verify Host program when installing an MX/DDC actuator shipped after 2nd QTR, 1999, on a

network commissioned before 2nd QTR, 1999, for indication of selector switch values. Proper selector switch

indication at the Host will ensure safe conditions at the facility.

Example
Poll field unit number 125 for 3 registers starting at register 8 with the actuator stopped between
the limits and in local mode.

Query 7D0300070003BFF6

Response 7D0306003D084400003E07

Message Breakdown

Query

Response

Slave (Field Unit) Address

Function

Starting Address Hi

Byte Count

Starting Address Lo

Data Hi (Register 40008)

No. of Points Hi

Data Lo (Register 40008)

No. of Points Lo

Data Hi (Register 40009)

BFF6

Error Check (CRC)

Data Lo (Register 40009)

Data Hi (Register 40010)

Data Lo (Register 40010)

3E07

Error Check (CRC)

Note 1: 003Dh equals 61 Decimal (actuator Analog Input 1 in percent format).
Note 2: 0844h equals 2116 Decimal or 0000 1000 0100 0100 Binary (actuator stopped between limits, local

mode, and Channel B Fail bit is ON).