User's Manual

PIN Pad 791 Programmer’s Manual (PCI POS-A) UDN PM0103-U Rev. 06
Section 5 – Administration and maintenance messages 2015-04-20
Page58
Uniform Industrial Corp. Proprietary and Confidential Total 342 pages
Message 1C Query Hardware Capability
Format: <SI>1C<SO>[LRC] (request frame)
<SI>1C[string]<SO>[LRC] (response frame)
Message length: Fixed 5 bytes (request). Variable (response).
Usage: This message is used to query the peripheral capability of PP791.
Message element:
Request frame (HOST to PIN Pad)
Field Length Value and description
<SI> 1 <0F>
1C 2 Message ID
<SO> 1 <0E>
[LRC] 1 Checksum
Response frame (PIN Pad to HOST)
Field Length Value and description
<SI> 1 <0F>
1C 2 Message ID
[string] Variable <1C>[HW1]<1C>[HW2]......
Possible string:
“ICC”: Smart card reader.
“SAM”: Security Access Module Slot.
“MSR”: Magnetic Stripe Reader.
“0” Pure PIN pad without peripherals.
<SO> 1 <0E>
[LRC] 1 Checksum
Message flow:
HOST Direction PIN Pad
Message 1C
(Request frame)


<ACK> (Good LRC)
<NAK> (Bad LRC)
<EOT> (after 3 NAKs)

Message 1C
(Response frame)
<ACK>/<NAK>/<EOT>


<EOT>