Page 8
I.L. 66A7508H05
Effective September 2003
Register 3 high byte contains a value corresponding to
Engineering Units (power of 10 signed exponent). Register 3
low byte contains a Mantissa Multiplier value (power of 2
signed exponent).
Register 2 through registers 0 contains a 48-bit unsigned
energy mantissa in units of watthours.
The data format of these 4 registers is given in
Figure 9
.
Energy = 2
Mantissa Multiplier
x (48 bit unsigned energy value)
x 10
Engineering Units
.
Figure 9: 4-Register Energy Data Format
6.9 Supported Diagnostic Sub-Functions
It is possible to obtain diagnostics from the mMINT or an
attached INCOM product using function code 08. See
Table 6
.
A single register is used for each UART counter within the
mMINT. Each INCOM device and the mMINT contain a unique
slave counter.
To use mMINT address 247 or 248 in the diagnostic query
SW2-1 must be properly set. See Section 5.8 and
Table 5
.
6.10 Exception Codes
Under certain circumstances, the mMINT will return an
exception code.
If the function in the query is not supported by the mMINT,
exception code 01 is returned in the response.
If the data (object) register is illegal, exception code 02 is
returned in the response.
If the data value in the query is illegal, exception code 03 is
returned.
If the slave INCOM product fails (usually a timeout), exception
code 04 is returned.
In certain circumstances, an exception code 05 (ACK) is
returned.
If the mMINT cannot perform the requested function, exception
code 07 (NAK) is returned.
If only a partial register is used in the query, exception code 84
is returned.
Sub-
function
No. #
(decimal)
Name
in the query use
0
echo query
mMINT or INCOM addr
1
restart communications
mMINT or INCOM addr
4
force listen
mMINT or INCOM addr
10
clear slave counters
mMINT or INCOM addr
11
UART bus message count
mMINT or INCOM addr
12
UART communication error count
mMINT or INCOM addr
13
slave exception error count
mMINT or INCOM addr
14
slave message count
mMINT or INCOM addr
15
slave no response count
mMINT or INCOM addr
16
slave NAK count
mMINT or INCOM addr
17
slave busy count
mMINT or INCOM addr
18
UART over run error count
mMINT or INCOM addr
20
clear UART counters
mMINT or INCOM addr
21
slave INCOM BCH error count
INCOM device addr
22
slave INCOM over run count
INCOM device addr
23
UART framing error count
mMINT or INCOM addr
24
UART noise error count
mMINT or INCOM addr
25
UART parity error count
mMINT or INCOM addr
26
mMINT firmware version & rev
mMINT addr
27
mMINT firmware month & day
mMINT addr
28
mMINT firmware year
mMINT addr
29
remove INCOM device(s)
mMINT or INCOM addr
30
reset INCOM routing addresses
mMINT addr
Table 6: Diagnostic Sub Function Numbers
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Energy Register 0
Byte1 of Mantissa
Byte0 of Mantissa
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Energy Register 1
Byte3 of Mantissa
Byte2 of Mantissa
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Energy Register 2
Byte5 of Mantissa
Byte4 of Mantissa
15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
Energy Register 3
Engineering Units
Mantissa Multiplier
Energy = 2
Mantissa Multiplier
* Mantissa * 10
Engineering Units
