Red Lion PAXDP - Manual (Page 23)

23
1 For Input Registers, replace the 4xxxx with a 3xxxx in the above register address. The 3xxxx are a mirror of the 4xxxx Holding Registers.
2 An attempt to exceed a limit will set the register to its high or low limit value.
400
300
200
99999
99999
99999
-19999
-19999
-19999
Alternate Setpoint 4 Value (Hi word)
Alternate Setpoint 3 Value (Hi word)
Alternate Setpoint 2 Value (Hi word)
Alternate Setpoint 4 Value (Lo word)
Alternate Setpoint 3 Value (Lo word)
Alternate Setpoint 2 Value (Lo word)
40047
40045
40043
40048
40046
40044
Setpoint List B
Setpoint List B
Setpoint List B
FREQUENTLY USED REGISTERS (Continued)
COMMENTS ACCESS
FACTORY
SETTING
HIGH LIMIT 2 LOW LIMIT 2 REGISTER NAME
REGISTER
ADDRESS 1
Read/Write
Read/Write
Read/Write
SERIAL RLC PROTOCOL COMMUNICATIONS
RLC Communications requires the Serial Communications Type Parameter
(

) be set to

.
SENDING SERIAL COMMANDS AND DATA
When sending commands to the meter, a string containing at least one
command character must be constructed. A command string consists of a
command character, a value identifier, numerical data (if writing data to the
meter) followed by a the command terminator character * or $.
Command Chart
COMMAND DESCRIPTION NOTES
N Node (Meter)
Address Specifier
Address a specific meter. Must be followed by
a one or two digit node address. Not required
when address = 0.
T Transmit Value
(read)
Read a register from the meter. Must be
followed by register ID character
V Value Change
(write)
Write to register of the meter. Must be followed
by register ID character and numeric data.
R Reset Reset a register or output. Must be followed by
register ID character.
P Block Print Request
(read)
Initiates a block print output. Registers are
defined in programming.
Command String Construction
The command string must be constructed in a specific sequence. The meter
does not respond with an error message to invalid commands. The following
procedure details construction of a command string:
1. The first characters consist of the Node Address Specifier (N) followed by a
1 or 2 character address number. The address number of the meter is
programmable. If the node address is 0, this command and the node address
itself may be omitted. This is the only command that may be used in
conjunction with other commands.
2. After the address specifier, the next character is the command character.
3. The next character is the Register ID. This identifies the register that the
command affects. The P command does not require a Register ID character.
It prints according to the selections made in print options.
4. If constructing a value change command (writing data), the numeric data is
sent next.
5. All command strings must be terminated with the string termination
characters * or $. The meter does not begin processing the command string
until this character is received. See Timing Diagram figure for differences
between terminating characters.
Register Identification Chart
1. Register Names are also used as Register Mnemonics during full transmission.
2. The registers associated with the P command are set up in Print Options
(Module 7). Unless otherwise specified, the Transmit Details apply to both T
and V Commands.
Command String Examples:
1. Address = 17, Write 350 to Setpoint 1
String: N17VM350*
2. Address = 5, Read Input A value
String: N5TA*
3. Address = 0, Reset Setpoint 4 output
String: RS*
Transmitting Data To the Meter
Numeric data sent to the meter must be limited to Transmit Details listed in
the Register Identification Chart. Leading zeros are ignored. Negative numbers
must have a minus sign. The meter ignores any decimal point and conforms the
number to the scaled resolution. (ie. The meter’s scaled decimal point position
is set for 0.0 and 25 is written to a register. The value of the register is now 2.5.
In this case, write a value of 250 to equal 25.0).
Note: Since the meter does not issue a reply to value change commands, follow
with a transmit value command for readback verification.
OFB
SOR
Input B Offset
Setpoint Register
J
X
OFA
AOR
Input A Offset
Analog Output Register
I
W
ABB
MMR Auto/Manual Register
H
U
ABA
SP4 Setpoint 4
G
S
MAX
SP3
Max
Setpoint 3
F
Q
MIN
SP2
Min
Setpoint 2
E
O
TOT
SP1
Total
Setpoint 1
D
M
CLC Calculation Value C
INB B
INA A
REGISTER
NAME 1
VALUE DESCRIPTION ID COMMAND SUPPORTED 2
T
T, R (reset command zeros Total)
T
T, V
T
T, V
T, V
T, V
T, V
T, R (reset command zeros
or tares input)
T, R (reset command zeros
or tares input)
Input A Absolute
(Gross) Value
Input B Absolute
(Gross) Value
T, V, R (reset command resets
setpoint output)
T, V, R (reset command resets
setpoint output)
T, V, R (reset command resets
setpoint output)
T, V, R (reset command resets
setpoint output)
Input A
Relative Value
Input B
Relative Value
T, R (reset command loads
current reading)
T, R (reset command loads
current reading)