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TRANSMIT DELAY

CRIMSON SOFTWARE

Following a transmit value (‘*’ terminator) or Modbus command, the

PAXDP will wait this minimum amount of time in seconds before issuing a

serial response.



to 

When communicating with Crimson 2 software, the PAXDP must be set in

default configuration type of:

Communications Type: MODBUS RTU †

Baud Rate: 38400

Data Bit: 8

ParityBit: no

Meter Unit Address: 247

SERIAL MODBUS COMMUNICATIONS

Modbus Communications requires that the Serial Communication Type

Parameter () be set to “” or “”.

SUPPORTED FUNCTION CODES

FC03: Read Holding Registers

1. Up to 32 registers can be requested at one time.

2. HEX <8000> is returned for non-used registers.

FC04: Read Input Registers

1. Up to 32 registers can be requested at one time.

2. Block starting point can not exceed register boundaries.

3. HEX <8000> is returned in registers beyond the boundaries.

4. Input registers are a mirror of Holding registers.

FC06: Preset Single Register

1. HEX <8001> is echoed back when attempting to write to a read only

register.

2. If the write value exceeds the register limit (see Register Table), then that

register value changes to its high or low limit. It is also returned in the

response.

FC08: Diagnostics

The following is sent upon FC08 request:

Module Address, 08 (FC code), 04 (byte count), “Total Comms” 2 byte count,

“Total Good Comms” 2 byte count, checksum of the string

“Total Comms” is the total number of messages received that were addressed

to the PAXDP. “Total Good Comms” is the total messages received by the

PAXDP with good address, parity and checksum. Both counters are reset to 0

upon response to FC08 and at power-up.

FC16: Preset Multiple Registers

1. No response is given with an attempt to write to more than 32 registers at

a time.

2. Block starting point cannot exceed the read and write boundaries (40001-

41280).

3. If a multiple write includes read only registers, then only the write registers

will change.

4. If the write value exceeds the register limit (see Register Table), then that

register value changes to its high or low limit.

FC17: Report Slave ID

The following is sent upon FC17 request:

RLC-PAXDP ab<0100h><20h><20h><10h>

16 Guid/Scratch Pad

Max Register Reads (32)

Max Register Writes (32)

Software Version Number

b = Linear Card “0” = None, “1” = Yes

a = SP Card, “0”-No SP, “2” or “4” SP

a = “0”(none), “2”, “4” SP card installed

b = “0”(none) or “1” Linear Card installed),

SUPPORTED EXCEPTION CODES

01: Illegal Function

Issued whenever the requested function is not implemented in the meter.

02: Illegal Data Address

Issued whenever an attempt is made to access a single register that does not

exist (outside the implemented space) or to access a block of registers that falls

completely outside the implemented space.

03: Illegal Data Value

Issued when an attempt is made to read or write more registers than the meter

can handle in one request.

07: Negative Acknowledge

Issued when a write to a register is attempted with an invalid string length.

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



ABBREVIATED PRINTING

Select  for full print or Command T transmissions (meter address,

parameter data and mnemonics) or  for abbreviated print transmissions

(parameter data only). This will affect all the parameters selected in the print

options. (If the meter address is 00, it will not be sent during a full transmission.)

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



PRINT OPTIONS



- Enters the sub-menu to select the meter parameters to appear during a

print request. For each parameter in the sub-menu, select  for that parameter

information to be sent during a print request or  for that parameter information

not to be sent. A print request is sometimes referred to as a block print because

more than one parameter information (meter address, parameter data and

mnemonics) can be sent to a printer or computer as a block.

PARAMETER

DESCRIPTION

 

Input A Value

 

Input B Value



Calculation



Total Value



Max. & Min.



Setpoint Values





Parameters below only appear when communications type () parameter

is set to .