SMC Networks HECR Series

Details of Communication Format
HECR 4-4
<Specifying unit>
Host →
SOH
UT
ENQ
34H
Check sum
CR
(H)
(L)
← Thermo-con
SOH
UT
STX
34H
Data
ETX
Check sum
CR
D1
D2
D3
(H)
(L)
Host →
ACK
UT
CR
(Possible to omit)
Data (D2, D2, D3) changes following bit line to ASCII code. (1 is for ON, 0 is for OFF)
D1
2
3
2
2
2
1
2
0
High temp. cut off alarm ERR12
Low temp. cut off alarm ERR13
Unused
Output failure alarm ERR15
D2
2
3
2
2
2
1
2
0
Upper temperature limit alarm WRN
Lower temperature limit alarm WRN
Thermostat alarm ERR14
DC power supply failure alarm ERR11
D3
2
3
2
2
2
1
2
0
External sensor failure alarm ERR18
Internal sensor failure alarm ERR17
During Auto tuning or auto tuning warning ERR19
Flow switch alarm ERR16 or level switch alarm ERR20
When some alarms/warnings go off at the same time, D1 to D3 reaches the added value.
Ex. When the “Upper temperature limit alarm” and the “DC power voltage alarm” go off simultaneously,
D2 will be 23X1+22X0+21X0+20X1=9(=39H).