Holding registers – Red Lion PAXCDC4 (MODBUS) User Manual

Page 4

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HOLDING REGISTERS

* See Coil Table for register mapping and Coil Descriptions for functionality.
Notes:
1. Any registers marked with “——” are unused and will return a value of HEX <8000>.
2. If a value larger than 4095 is written to the AOR register, 4095 will be loaded.
3. TRX delay is the minimum time from the reception of the last character in the

MODBUS

Query until the response is started. The minimum delay value is equal to

2 character times (2 msec min.). The user can increase the delay time by writing to the TRX Delay register. Any value written to the TRX Delay register that is
less than the value calculated at power up will be ignored. The TRX Delay value is stored in E

2

PROM memory. On power-up, the calculated value is compared to

the value read back from the E

2

PROM. The greater of the 2 values will be used as the TRX Delay value and will be written to the TRX Delay register.

4. Numeric data is limited to value -19999 to 99999.
5. Numeric data is limited to the value listed for that parameter according to the meter’s literature.

4

Values less than 65,535 will be in (LO word). Values greater than 65,535 will continue into (HI word). Negative values are represented by two’s complement of the

combined (HI word) and (LO word).

HOLDING

REGISTER

PAX

4

PAXI

5

PAXCK/PAXTM

5

PAXDR

5

ACCESS

ACCESS

ACCESS

40001:

Input (HI)

Read Only

CTA (HI)

Timer (HI)

Read/Write

Rate A (HI)

Read Only

40002:

Input (LO)

Read Only

CTA (LO)

Timer (LO)

Read/Write

Rate A (LO)

Read Only

40003:

Total (HI)

Read Only

CTB (HI)

Counter (HI)

Read/Write

Rate B (HI)

Read Only

40004:

Total (LO)

Read Only

CTB (LO)

Counter (LO)

Read/Write

Rate B (LO)

Read Only

40005:

Min (HI)

Read Only

CTC (HI)

RTC Time (HI)

Read/Write

Rate C (HI)

Read Only

40006:

Min (LO)

Read Only

CTC (LO)

RTC Time (LO)

Read/Write

Rate C (LO)

Read Only

40007:

Max (HI)

Read Only

RTE (HI)

RTC Date (HI)

Read/Write

Total A (HI)

Read/Write

40008:

Max (LO)

Read Only

RTE (LO)

RTC Date (LO)

Read/Write

Total A (LO)

Read/Write

40009:

SP1 (HI)

Read/Write

Min (HI)

SP1 (HI)

Read/Write

Total B (HI)

Read/Write

40010:

SP1 (LO)

Read/Write

Min (LO)

SP1 (LO)

Read/Write

Total B (LO)

Read/Write

40011:

SP2 (HI)

Read/Write

Max (HI)

SP2 (HI)

Read/Write

Total C (HI)

Read/Reset

40012:

SP2 (LO)

Read/Write

Max (LO)

SP2 (LO)

Read/Write

Total C (LO)

Read/Reset

40013:

SP3 (HI)

Read/Write

SFA (HI)

SP3 (HI)

Read/Write

SFA (HI)

Read/Write

40014:

SP3 (LO)

Read/Write

SFA (LO)

SP3 (LO)

Read/Write

SFA (LO)

Read/Write

40015:

SP4 (HI)

Read/Write

SFB (HI)

SP4 (HI)

Read/Write

SFB (HI)

Read/Write

40016:

SP4 (LO)

Read/Write

SFB (LO)

SP4 (LO)

Read/Write

SFB (LO)

Read/Write

40017:

Polling1 *

Read/Write

SFC (HI)

SP1 Off (HI)

Read/Write

SFC (HI)

Read/Write

40018:

Reset *

Read/Write

SFC (LO)

SP1 Off (LO)

Read/Write

SFC (LO)

Read/Write

40019:

TRX Delay

3

Read/Write

LDA (HI)

SP2 Off (HI)

Read/Write

LDA (HI)

Read/Write

40020:

AOR

2

Read/Write

LDA (LO)

SP2 Off (LO)

Read/Write

LDA (LO)

Read/Write

40021:

CSR

Read/Write

LDB (HI)

SP3 Off (HI)

Read/Write

LDB (HI)

Read/Write

40022:

Terminate1

Read/Write

LDB (LO)

SP3 Off (LO)

Read/Write

LDB (LO)

Read/Write

40023:

LDC (HI)

SP4 Off (HI)

Read/Write

40024:

LDC (LO)

SP4 Off (LO)

Read/Write

40025:

SP1 (HI)

Timer Start (HI)

Read/Write

SP1 (HI)

Read/Write

40026:

SP1 (LO)

Timer Start (LO)

Read/Write

SP1 (LO)

Read/Write

40027:

SP2 (HI)

Counter Start (HI)

Read/Write

SP2 (HI)

Read/Write

40028:

SP2 (LO)

Counter Start (LO)

Read/Write

SP2 (LO)

Read/Write

40029:

SP3 (HI)

Timer Stop (HI)

Read/Write

SP3 (HI)

Read/Write

40030:

SP3 (LO)

Timer Stop (LO)

Read/Write

SP3 (LO)

Read/Write

40031:

SP4 (HI)

Counter Stop (HI)

Read/Write

SP4 (HI)

Read/Write

40032:

SP4 (LO)

Counter Stop (LO)

Read/Write

SP4 (LO)

Read/Write

40033:

Polling1 *

Polling1 *

Read/Write

Polling1 *

Read/Write

40034:

Polling2 *

Polling2 *

Read/Write

Polling2 *

Read/Write

40035:

TRX Delay

3

TRX Delay

3

Read/Write

TRX Delay

3

Read/Write

40036:

MMR

MMR

Read/Write

MMR

Read/Write

40037:

AOR

2

RTC Day

Read/Write

AOR

2

Read/Write

40038:

SOR

SOR

Read/Write

SOR

Read/Write

40039:

Reset *

Reset *

Read/Write

Reset *

Read/Write

40040:

40041:

Terminate1

Terminate1

Read/Write

Terminate1

Read/Write

40042:

Terminate2

Terminate2

Read/Write

Terminate2

Read/Write

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