Epson TM-T88V-DT Technical Reference Manual page 106

Item
Control script
Communication 
speed (bps)
Data bit
Parity
Stop bit
Flow control
6
Click the [Operating test].
The [Operating test -- Webpage Dialog] screen is displayed.
7
Enter the sending command in the left text box and click [Send] to send
the commend to the device. [Success] appears on the right side of the
window if a response is sent from the device.
106
Select the control script to control the serial communication device.
Select the communication speed.
Select the data bit.
Select the parity.
Select the stop bit.
Select whether there is flow control or not.
Description