TE Technology TC-48-20 - Manual (Page 52)

52
5. ALARM STATUS
Write Command: NA
Read Command: 03
Interpret:
Convert the hex number to binary and interpret bits as follows:
All zeros==means no alarms.
Bit 0==1 means HIGH ALARM 1.
Bit 1==1 means LOW ALARM 1.
Bit 2==1 means HIGH ALARM 2.
Bit 3==1 means LOW ALARM 2.
Bit 4==1 means OPEN CONTROL SENSOR.
Bit 5==1 means OPEN SECONDARY SENSOR.
Bit 6==1 means a value has changed via keypad entry.
For example, suppose the returned value is 0009
16
. This converts to
001001
2
, which means that there is a low alarm condition for the
secondary sensor and a high alarm condition for the control sensor.
“Bit 0” is the rightmost bit, or the least significant bit.
6. DESIRED CONTROL TEMPERATURE (SET TEMPERATURE)
Write Command: 1c
Read Command: 50
Interpret:
ASCII characters which represent a hex value in two’s complement
form. Convert the two’s complement value to a decimal value and
divide by 10.0 to represent the temperature as a degrees decimal
value.
7. PROPORTIONAL BANDWIDTH
Write Command: 1d
Read Command: 51
Interpret: Proportional bandwidth in degrees.
For writing, multiply desired bandwidth by 10
10
then convert to
hexadecimal. For reading, convert to decimal then divide by 10
10
1 degree bandwidth would be 10
10
.
20 degree bandwidth would be 200
10
.
8. INTEGRAL GAIN
Write Command: 1e
Read Command: 52
Interpret: Gain in repeats/minute
For writing, multiply desired integral gain by 100
10
then convert to
hexadecimal. For reading, convert to decimal then divide by 100
10
.
0.01 repeats/minute would be 1
10
.
1.00 repeats/minute would be 100
10
.
9. DERIVATIVE GAIN
Write Command: 1f
Read Command: 53
Interpret: Gain in minutes.
For writing, multiply desired integral gain by 100
10
then convert to
hexadecimal. For reading, convert to decimal then divide by 100
10
.
0.01 minutes would be 1
10
.
1.00 minutes would be 100
10
.