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Serial Communication (SCOM) Interface
Acknowledge 50% Contrast:
0x06
0x03
0x82
0x41
Display Type/Model Number "TYP"
This command shall be sent to the display in order to identify the display type by its
model number / part number. No data shall be sent with this command.
The display will reply to this command with an ACK attention code. The DATA field will be set to an
ASCII string to indicate the specified Type/Model Number, e.g: "JH23T01MMD-A1"
Examples:
Command Type/Model Number
0x07
0xFF
Acknowledge Type/Model Number "JH20T03":
0x06
0xFF
0x4A
0x48
Operational Requirements
The following sections define the operational requirements.
Initial and Default Display Conditions
After any power cycle, the display will start-up with the maximum brightness control range
available at the local control and with combined control of the backlight enabled from both the local
control (potentiometer) and the remote BRT command. If no serial messages are received, the
display will stay in this configuration.
Serial Message Failure
If serial messages stop being transmitted or are corrupt, the display will remain at the last
commanded brightness.
Periodic Messages
The Brightness Command shall be transmitted to the display at a repetition no faster than 4 Hz.
Fault Detection and Power Interruption Recovery
To support implementation of keep-alive alarm logic in application software on the computer, the
Brightness Command message output from the computer to the display can be repeated once per
second, driven by receiving valid acknowledge messages from the display. The keep-alive logic
should tolerate intermittent loss of valid acknowledge messages without activating an alarm.
Response Time
Communication Interface
IND100084-1
0x4D
0x43
0x43
0x38
0x30
0x38
0x54
0x59
0x50
0x54
0x59
0x50
0x32
0x30
0x54
0x06
0x1D
0x30
0x6C
0x00
0xFC
0x07
0x1A
0x30
0x33
0x54
72
INB100005-3 (Rev 9)
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