TOHO ELECTRONICS TTM-00BT - Manual (Page 18)

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7.6 Heater wire break alarm output
The output will be turned on if a heater wire break (no output even if the output is turned on)
remains for at least 190mS.
7.7 SSR breakdown alarm output
The output will be turned on if an SSR breakdown (there is output even if the output is off) remains
for at least 190mS.
7.8 Error alarm output
The output will be turned on in the case of a memory error, A/D error, or sensor error.
7.9 Communication
7.9.1 What can be done by communication
Communication allows you to read and write data in "Changing settings" and "Reading
information" and other items specified in "6. Table of identifiers."
However, reading and writing with ordinary commands are conducted on the RAM inside this
product. Turning this product off and back on will restore the written data back to what it was
before the writing (the values saved on the EEPROM).
To save written data on the EEPROM of this product, execute the data storage request message
(STR).
(See "7.9.10 Communication precautions.")
7.9.2 Pre-communication settings:
Before communication, this product must be set to initial settings for "setting a communication
speed" and "setting a unit number."
1) "Setting a communication speed": Set this value with DIP switches.
Use DIP switches 1 and 2. Always turn the 3 and 4 to OFF.
Following are the possible combinations.
DIP switch
1 2 3 4
Communication
speed
OFF
ON
OFF
ON
OFF
OFF
ON
ON
Reserved Reserved 4800 bps
9600 bps
192000 bps
384000 bps
Initial setting: 1: ON, 2 to 4: OFF (9600 bps)
2) "Setting a unit number": Set this value with the rotary switch.
Set a unit number in a hexadecimal number (0 to F).
Initial setting: 0 (unit No. 00)
3) "Setting a response delay": Set a time to be taken from the time when a high-level computer
finishes transmitting a "request message" to the time when the line is delivered and this
product enters an input state.
• Set range: 0 to 250mS
• Initial value: 0mS
* Notes: An insufficient response delay may result in abnormal communication. Note also
that, in real operations, the processing time of this product will be added to the
response delay.
* Caution: Before "setting a communication speed" and "setting a unit number," always
turn off this product.